Selkirk Rex Longhair
Caring for Your Faithful CompanionSelkirk Rex Longhair: What a Unique Breed!
Your cat is special! She senses your moods, is curious about your day, and has purred her way into your heart. Chances are that you chose her because you like Longhaired Selkirk Rexes (sometimes called “Curly-coated cats”) and you expected her to have certain traits that would fit your lifestyle, like:
Good with children and other pets
Requires very little grooming
Affectionate, easygoing, and sweet
However, no cat is perfect! You may have also noticed these characteristics:
Needs the company of other pets or people and does not do well in isolation
Prone to a number of health problems
Is it all worth it? Of course! She’s full of personality, and you love her for it! She is social, affectionate, and laid back, making her a sweet and loving family companion.
The first Selkirk Rex, Miss DePesto, was rescued from a Montana shelter in 1987. Unlike the Cornish or Devon Rex, the gene that give Selkirk’s their loose, curly coat and brittle whiskers is dominant, providing litters of both straight and curly kittens. Because of their initial breeding with Persians and British Shorthairs, they come in both longhair and shorthair varieties. The coat of the longhair type is soft and woolly looking, lending them the nickname of a Cat in Sheep’s Clothing. They are a sturdy breed, and their laid back attitude and patience makes them great companions for households with children and other pets.
Your Longhaired Selkirk Rex’s Health
We know that because you care so much about your cat, you want to take great care of her. That is why we have summarized the health concerns we will be discussing with you over the life of your Selkirk. By knowing about the health concerns common among Longhaired Selkirk Rexes, we can help you tailor an individual preventive health plan and hopefully prevent some predictable risks in your pet.
Many diseases and health conditions are genetic, meaning they are related to your pet’s breed. The conditions we will describe here have a significant rate of incidence or a strong impact upon this breed particularly, according to a general consensus among feline genetic researchers and veterinary practitioners. This does not mean your cat will have these problems, only that she may be more at risk than other cats. We will describe the most common issues seen in Longhaired Selkirk Rexes to give you an idea of what may come up in her future. Of course, we can’t cover every possibility here, so always check with us if you notice any unusual signs or symptoms.
This guide contains general health information important to all felines as well as information on genetic predispositions for Longhaired Selkirk Rexes. The information here can help you and your pet’s healthcare team plan for your pet’s unique medical needs together. At the end of the booklet, we have also included a description of what you can do at home to keep your Curly-coated cat looking and feeling her best. We hope this information will help you know what to watch for, and we will all feel better knowing that we’re taking the best possible care of your friend.
General Health Information for your Longhaired Selkirk Rex
Obesity is a major disease that contributes to a surprisingly large number of illnesses and deaths in cats.
This revelation is more well-known and well-understood today than in the last few decades, but too many owners are still ignoring the dangers of extra weight on their pets. Excess weight is one of the most influential factors in the development of arthritis, diabetes, and other life-threatening diseases. Everyone knows—many firsthand from personal experience—how even shedding just a few pounds can result in improved mobility and increased overall motivation to be active. And the same is true for your pet.
Research suggests that carrying excess weight may shorten a pet’s life by as much as two years, and can cause the onset of arthritis two years sooner. Diabetes, an inherited disease, has a much higher chance of developing in overweight pets, and may never become a problem for a healthy-weight cat. The more obese a cat becomes, the more likely it will become diabetic. Hepatic lipidosis, or fatty liver, is another potentially fatal disease in overweight pets; hepatic lipidosis can develop in as few as 48 hours when an overweight cat stops eating for any reason.
So how can we help our pets stay trim? Understanding your cat’s dietary habits is key. The average cat prefers to eat about 10-15 times a day, just a few nibbles at a time. This method, free-feeding, works well for most cats, but boredom may increase the number of trips your cat makes to the food bowl. By keeping your cat playfully active and engaged, you’ll help your pet stay healthy and have some fun at the same time! A string tied to a stick with something crinkly or fuzzy on the other end of the string, and a little imagination—you and your cat will both be entertained. Food puzzles, like kibbles put in a paper bag or under an overturned basket or box, may help to motivate cats with more food-based interests to romp and tumble.
For really tough cases of overeating, you will have to take a firm stance, and regulate your cat’s food intake. Instead of filling your cat’s bowl to the top, follow the feeding guide on the food package and be sure to feed a high-quality adult cat diet as recommended by your vet. Replace your cat’s habits of eating when bored with extra playtime and affection. Cats typically adjust their desires for personal interaction by the amount of affection offered to them, so in other words, ignoring your cat means your cat will ignore you. By the same token, loving on and playing with your cat a lot will cause your cat to desire that time with you. A more active cat means a healthier, happier pet—and owner!
Dental disease is one of the most common chronic problems in pets who don’t have their teeth brushed regularly. Unfortunately, most cats don’t take very good care of their own teeth, and this probably includes your Selkirk. Without extra help and care from you, your cat is likely to develop potentially serious dental problems. Dental disease starts with food residue, which hardens into tartar that builds up on the visible parts of the teeth, and eventually leads to infection of the gums and tooth roots. Protecting your cat against dental disease from the start by removing food residue regularly may help prevent or delay the need for advanced treatment of dental disease. This treatment can be stressful for your cat and expensive for you, so preventive care is beneficial all around. In severe cases of chronic dental infection, your pet may even lose teeth or sustain damage to internal organs. And, if nothing else, your cat will be a more pleasant companion not knocking everyone over with stinky cat breath! We’ll show you how to keep your cat’s pearly whites clean at home, and help you schedule regular routine dental exams.
Like all cats, Longhaired Selkirk Rexes are susceptible to bacterial and viral infections such as panleukopenia, calicivirus, rhinotracheitis, and rabies, which are preventable through vaccination. The risk of your cat contracting these diseases is high, so the corresponding vaccines are called “core” vaccines, which are highly recommended for all cats. In addition, vaccines are available to offer protection from other dangerous diseases like feline leukemia virus (FeLV). In making vaccination recommendations for your cat, we will consider the prevalence of these diseases in our area, your cat’s age, and any other risk factors specific to her lifestyle.
All kinds of worms and bugs can invade your Curly-coated cat’s body, inside and out. Everything from fleas and ticks to ear mites can infest her skin and ears. Hookworms, roundworms, heartworms, and whipworms can get into her system in a number of ways: drinking unclean water, walking on contaminated soil, or being bitten by an infected mosquito. Some of these parasites can be transmitted to you or a family member and are a serious concern for everyone. For your feline friend, these parasites can cause pain, discomfort, and even death, so it’s important that we test for them on a regular basis. Many types of parasites can be detected with a fecal exam, so it’s a good idea to bring a fresh stool sample (in a stink-proof container, please) with your pet for her twice-a-year wellness exams. We’ll also recommend preventive medication as necessary to keep her healthy.
Spay or Neuter
One of the best things you can do for your Selkirk is to have her spayed (neutered for males). In females, this procedure includes surgically removing the ovaries and usually the uterus; in males, the testicles are surgically removed. Spaying or neutering your pet decreases the likelihood of certain types of cancers and eliminates the possibility of your pet becoming pregnant or fathering unwanted litters. Both sexes usually become less territorial and less likely to roam, and neutering particularly decreases the occurrence of urine spraying and marking behaviors in males. Performing this surgery also gives us a chance, while your pet is under anesthesia, to identify and address some of the diseases your cat is likely to develop. For example, if your pet needs hip X-rays to check for dysplasia or a thorough dental exam to look for stomatitis, these procedures can be conveniently performed at the same time as the spay or neuter to minimize the stress on your cat. Routine blood testing prior to surgery also helps us to identify and take precautions against common problems that increase anesthetic or surgical risk. It sounds like a lot to keep in mind, but don’t worry – we’ll discuss all the specific problems we will look for with you when the time arrives.
Genetic Predispositions for Longhaired Selkirk Rexes
Cardiomyopathy is the medical term for heart muscle disease, either a primary inherited condition or secondary to other diseases that damage the heart. The most common form, called hypertrophic cardiomyopathy, or HCM, is a thickening of the heart muscle often caused by an overactive thyroid gland. Another example is dilated cardiomyopathy, or DCM, which can be caused by a dietary deficiency of the amino acid taurine. While DCM was a big problem in the past, all major cat food producers now add taurine to cat food, so DCM is rarely seen in cats with high-quality diets today.
Catching signs of cardiomyopathy early is important, but a cat’s normal tendency to hide illness can make symptoms difficult to spot. The first thing a pet parent usually notices is rapid breathing, lethargy, and a poor appetite. These symptoms may appear to come on suddenly, often between a few hours to a few days, but in most cases, the cat has actually been suffering quietly for weeks to months and is now in serious trouble.
For a few breeds of cats, genetic testing is available for a specific gene abnormality that causes HCM. Most cats with cardiomyopathy have a heart murmur that can be detected during a wellness physical exam, but a specific diagnosis requires more advanced medical imaging. Finding this problem early, when treatment is most effective, is another important reason to have your pet evaluated twice a year for life.
Cats with heart disease may develop blood clots in their arteries known as FATE (feline aortic thromboembolisms). Blood clots most commonly become lodged just past the aorta, the large blood vessel that supplies blood from the heart to the body, blocking normal blood flow to the hind legs. When this happens, one or both hind legs may become paralyzed, cold, or painful. FATE is a life-threatening disease, and requires quick action and prolonged medical care. Cats who survive thromboembolisms, however, usually regain full function of their limbs. If your cat is diagnosed with heart disease, we may prescribe medications to help lower the risk of blood clots. If your cat suddenly can’t walk or is dragging one or both back legs and crying, don’t wait! Your pet needs immediate emergency care.
Brachycephalic syndrome, or respiratory distress syndrome, is a disease that affects brachycephalic cats – those with a short nose and flat face—such as your Longhaired Selkirk Rex. Although these cats have the same amount of tissue in their noses and throats as other breeds of cats, the flattened features provide less space for the tissue to grow. Consequently, the soft palate, the soft area in the back of the roof of the mouth, grows too long for the mouth and hangs down into the airway. The nostrils are also often too small, and sometimes the trachea, or windpipe, is narrow and undersized. All of these elements contribute to a narrow and obstructed airway in cats with brachycephalic syndrome. Many affected cats can barely breathe normally; many have sleep apnea and snore, have chronic respiratory infections, and develop swelling and congestion in their throats, which only worsens the problem. Brachycephalic syndrome cats are also more prone to heat stroke and have a higher risk for anesthetic complications. Many cats with this syndrome die at an early age, but correcting the defects through surgery as soon as possible, ideally at the time of spaying or neutering, can help your pet live a long and normal life. With surgery, the long soft palate can be shortened, the nostrils can be snipped open, and more regular breathing can be restored. Some brachycephalic syndrome cats are not severely affected early on, but may develop more serious problems as they get older, in which case surgery can be done at that time.
When your cat urinates outside the litter box, you may be annoyed or furious, especially if your best pair of shoes was the location chosen for the act. But don’t get mad too quickly—in the majority of cases, cats who urinate around the house are sending signals for help. Although true urinary incontinence, the inability to control the bladder muscles, is rare in cats and is usually due to improper nerve function from a spinal defect, most of the time, a cat that is urinating in “naughty” locations is having a problem and is trying to get you to notice. What was once considered to be one urinary syndrome has turned out to be several over years of research, but current terminology gathers these different diseases together under the label of Feline Lower Urinary Tract Diseases, or FLUTD. Many of these diseases cause similar symptoms, for example, a cat with urolithiasis, or bladder stones, shows many of the same symptoms as a cat with a urinary tract infection, which may also present like the symptoms of a blocked tomcat. Watching for any signs of abnormal urination, like urinating on cool surfaces (a tile floor or bathtub, for example), blood in the urine, straining to urinate with little or no urine production, or crying in the litterbox can help you identify the first signs of a FLUTD. If your cat demonstrates any of these symptoms, call us right away for an urgent appointment. Particularly for male cats, if the urethra is blocked with stones or crystals, the cat is not able to expel any urine, which can become an emergency within only a few hours. The inability to urinate is painful and quickly fatal, so if your cat may be blocked, seek emergency care immediately.
Cats are very good at hiding how sick they are, so the early signs of FLUTD are easy to miss. Bringing your cat in for regular urinalysis testing allows us to check for signs of infection, kidney disease, crystals in the urine, and even diabetes. X-rays and ultrasounds can also help detect the presence of stones in the bladder or kidneys. Lower urinary tract disease can be controlled with medications and special diets, though severe cases of FLUTD may also require surgery.
Polycystic Kidney Disease
Polycystic kidney disease (PKD) is caused by a defective gene. The disease was first recognized in Persians, and is seen occasionally in other breeds, including Longhaired Selkirk Rexes. Affected kittens are born with miniscule cysts inside the kidneys and sometimes the liver that slowly enlarge over time, eventually destroying the affected organ. Symptoms usually become apparent around seven years of age on average. These symptoms include weight loss, vomiting, excessive thirst, and poor overall health. There is no cure for PKD, although special diets and medication can slow the progress of the resulting organ failure; diagnosing PKD as early as possible may allow effective support of kidney and liver function for years. Routine annual urine or blood testing is therefore recommended to monitor for early organ dysfunction in all adult cats. If PKD is indicated, an ultrasound exam of the abdomen may be performed to visualize the cysts and assess the current damage. A genetic test for PKD is also available, and responsible breeders recommend that cats who carry the PKD gene should not be used for breeding.
Portosystemic shunt is a disorder seen occasionally in cats, in which some of the blood supply to the liver is shunted around it instead. This condition deprives the liver of the full blood flow it needs to grow and function properly, leading to an undersized, poorly nourished liver that cannot fully remove toxins from the bloodstream. These unfiltered waste materials, such as ammonia and bile acids, eventually build up in the bloodstream and act as poisons to the body’s systems. For example, in severe cases, high blood-ammonia levels can cause neurological issues. Cats affected by a portosystemic shunt are also extremely sensitive to drugs and anesthetics, as the liver cannot efficiently cleanse the bloodstream of the added chemicals. If your cat shows symptoms of a portosystemic shunt, we will perform blood testing or a liver ultrasound scan can to check for the disorder. In some cases, surgery can restore proper blood flow to the liver.
Most commonly seen in dogs, hip dysplasia may also occur in cats, especially in Longhaired Selkirk Rexes. Dysplasia is an inheritable condition that causes malformation of the hip joints and subsequent arthritis. Usually a cat shows very few clinical symptoms as an adolescent, but begins slowing down and acting like an older cat prematurely within the first few years. Severely affected cats, however, may show lameness by six months of age. Pelvic X-rays are needed to detect early hip dysplasia; cats should be anesthetized or sedated for this procedure, in part because the radiograph machine is a frightful and stressing situation for cats, but also because X-rays of the pelvis should be taken while the cat is perfectly still. Anesthesia allows for proper positioning of the cat to produce a clear, diagnostic radiograph, without the pain and fear most cats experience with X-rays, especially if they already have sore hips. Hip dysplasia is best treated when detected early, so initial X-rays of the hips are recommended at the time of your kitten’s spay or neuter, usually around three to six months of age. X-rays can also be conveniently scheduled at the time of your cat’s annual dental cleaning in order to minimize the number of anesthetic events your cat undergoes. If necessary, hip dysplasia can be alleviated by surgical restructuring of the pelvis to help relieve pain and allow greater mobility for your affected cat. Because the disease is genetic, if you are purchasing a purebred kitten, be sure to ask your breeder whether the parents’ hips have been X-rayed.
Mast Cell Tumors
Mast cell tumors are a particularly nasty type of skin cancer, and the sooner they are surgically removed the better. Unfortunately, mast cell tumors often look similar to many other kinds of skin lumps and lesions, so it’s hard to know when to be concerned. Of all the skin problems found commonly in your Longhaired Selkirk Rex, some may be harmful and some not, but any skin lump, bump, or irritation on your cat is cause enough for concern. All abnormalities should be checked out by the vet, and any suspicious or questionable growths should be surgically removed and tested as soon as possible. Many cancers can be cured by surgically removing their growths, so early evaluation of all skin abnormalities is critical.
The term “naso” refers to the nose and sinus cavities and “pharyngeal” to the pharynx at the back of the mouth. A nasopharyngeal polyp is an abnormal growth that may develop in these areas as the result of chronic inflammation, such as an ear or sinus infection. Once present, the polyp itself can cause further problems by obstructing the sinuses or the ear canal, sometimes leading to secondary infections, balance problems, or just constant annoyance for the cat, who may feel like there’s something stuck in an unscratchable place. Some cat breeds, like your Longhaired Selkirk Rex, tend to form these polyps more than other breeds. Surgery to remove polyps is generally recommended.
Gingivitis is inflammation of the gingiva, or gums. Just like in people, it causes redness and pain in the gums and is often linked to other diseases. In mild cases, gingivitis can be treated with a mouth rinse and represents only a minor problem, but without treatment it can progress to more severe afflictions such as periodontal disease or Stomatitis Gingivitis has also been associated with resorptive lesions and retrovirus infections such as the feline leukemia virus (FeLV) and the feline immunodeficiency virus (FIV). One of the best things you can do for your friend is to have his mouth evaluated by us often. Remember, cats are superstar actors and are great at masking illnesses, so you may not realize he is having any oral problems at all without an examination. With our trained healthcare team, we can safely look in his mouth to see if he is experiencing any pain or tooth trouble. Even though your cat may look great and act normally, he may be hiding a real problem in the back of his mouth!
Demodicosis is caused by several species of microscopic mites in the Demodex family. These mites live in hair follicles, and are usually passed on to kittens by contact with their mother. Many cats probably have a few of these mites but don’t have any symptoms; in normal cats, the immune system keeps these mites from getting out of hand. Some breeds, however, like your Longhaired Selkirk Rex are prone to an immune-system defect that allows these mites to live and reproduce excessively. Your cat may also have a specific allergy to these mites. In either case, affected cats will develop itchy, red lesions often on the face or feet. In suspected cases of demodicosis, we will perform a skin scrape of the affected areas to identify the mites under the microscope. Treatments include topical medications or lime sulfur dips and sometimes antibiotics to control secondary infections of the inflamed areas.
Separation Anxiety Syndrome
While the vast majority of felines prefer a solitary lifestyle, some Longhaired Selkirk Rexes can form unhealthy and excessive attachments to their owners. They can become so attached that when their human counterparts aren’t around, they quickly become anxious or bored, leading to destructive behaviors such as paper shredding, vocalization, or litter box amnesia. Some cats may even exhibit aggressive behaviors when they know their owners are about to leave. To avoid the vices of boredom, make sure your cat has plenty of special toys or food puzzles to keep his mind and body active while he is left alone. A consistent daily routine and a stable home environment can also help prevent the troubles of separation anxiety. In severe cases, anti-anxiety medication may also be used to help keep your worried friend relaxed.
Lysosomal Storage Disease (LSD)
Lysosomal storage disease is caused by a genetic defect that prevents the formation of certain enzymes needed to perform metabolic functions in the body. These missing enzymes normally break down waste products as they accumulate in the organs so they can be excreted naturally, but with LSD, toxins accumulate in the cat’s tissues instead. These toxins particularly affect nervous tissue cells, causing nerves to swell and cease normal functions. LSD is most commonly diagnosed in kittens; affected animals are usually normal at birth but develop symptoms within the first few months of life. Symptoms may vary depending on the severity of the enzyme deficiency, but include lack of balance, exercise intolerance, poor vision, abnormal psychological behaviors, fainting, seizures, and failure to grow. Unfortunately, lysosomal storage disease is always fatal. Close relatives of affected kittens should not be used for breeding.
Although we hate to think of the worst happening to our pets, when disaster strikes, it’s best to be prepared. One of the most effective life-saving treatments available in emergency medicine today is the use of blood transfusions. If your cat is ever critically ill or injured and in need of a blood transfusion, the quicker the procedure is started, the better the pet’s chance of survival.
Just like people, individual cats have different blood types. Most domestic cats have type A blood, but purebred cats, like your Abyssinian often have a different blood type, usually type B or very rarely, type AB. Determining your cat’s blood type is essential before starting a transfusion, so knowing your cat’s type ahead of time can save crucial minutes. Blood typing is recommended for all cats, but is especially important for purebreds. This test can be done as part of a routine wellness blood testing, and the results can be added to your pet’s microchip record as well for fast action even if you aren’t there.
Neonatal Isoerythrolysis (NI)/Hemolytic Icterus
Neonatal isoerythrolysis, or NI, is a rare immune-mediated disease that is caused when a newborn kitten with type A blood suckles colostrum (first milk) from a mother with type B blood or vice-versa. The mother’s immunity against type A blood is contained in her colostrum, so when the kitten nurses, the antigen is absorbed into the kitten’s bloodstream through ingestion. The resulting immune reaction develops antibodies that attack and destroy the kitten’s own red blood cells. Consequently, affected kittens usually die within a few days of birth. NI can occur in many cat breeds, but is more often seen in breeds with a higher likelihood of having type B blood like your Longhaired Selkirk Rex. If you plan to breed your cat, you will need to learn more about this problem beforehand from your veterinarian.
Dystocia is a term that means difficulty giving birth. In some breeds, nearly all litters must be delivered by Cesarean-section surgery as normal birth is not possible due to the breed’s specific physical characteristics. While breeding any cat requires a serious commitment to learning about and preparing for that breed’s preventable problems, professional breeders warn that proper Longhaired Selkirk Rex breeding can be costly and carries a higher risk of death for both the mother and kittens than in other breeds.
Taking Care of Your Longhaired Selkirk Rex at Home
Much of what you can do at home to keep your cat happy and healthy is common sense, just like it is for people. Watch her diet, make sure she gets plenty of exercise, regularly brush her teeth and coat, and call us or a pet emergency hospital when something seems unusual (see “What to Watch For” below). Be sure to adhere to the schedule of examinations and vaccinations that we recommend for your pet. During your cat’s exams, we’ll perform her necessary “check-ups” and test for diseases and conditions that are common in Selkirks. Another very important step in caring for your pet is signing her up for pet health insurance. There will certainly be medical tests and procedures she will need throughout her life and pet health insurance will help you cover those costs.
Routine Care, Diet, and Exercise
Build your pet’s routine care into your schedule to help your Curly-coated cat live longer, stay healthier, and be happier during her lifetime. We cannot overemphasize the importance of a proper diet and exercise routine for your pet.
Supervise your pet as you would a young child. Keep doors closed, pick up after yourself, and block off rooms as necessary. This will help keep her out of trouble, off of inappropriate surfaces for jumping, and away from objects she shouldn’t put in her mouth.
To keep her hair curly she requires little maintence, needing only regular, gentle brushing.
Longhaired Selkirk Rexes have generally good teeth, and you can keep them perfect by brushing them at least twice a week!
Check her ears weekly for wax, debris, or signs of infection and clean when necessary. Don’t worry—we’ll show you how!
She needs daily play sessions that stimulate her natural desire to hunt and explore. Keep her mind and body active or she may develop behavior issues.
Cats are meticulously clean and demand a clean litter box. Be sure to provide at least one box for each cat and scoop waste daily.
It is important that your cat drinks adequate amounts of water. If she won’t drink water from her bowl try adding ice cubes or a flowing fountain.
Feed a high-quality feline diet appropriate for her age.
Exercise your cat regularly by engaging her with high-activity toys.
What to Watch For
An abnormal symptom in your pet could be just a minor or temporary issue, but it could also be the sign of serious illness or disease. Knowing when to seek veterinary help, and how urgently, is essential to taking care of your cat. Many diseases can cause cats to have a characteristic combination of symptoms, which together can be a clear signal that your Longhaired Selkirk Rex needs help.
Give us a call for an appointment if you notice any of these types of symptoms:
Change in appetite or water consumption
Tartar build-up, bad breath, red gums, or broken teeth
Itchy skin (scratching, chewing, or licking), hair loss, or areas of shortened fur
Lethargy, mental dullness, or excessive sleeping
Fearfulness, aggression, or other behavioral changes
Abnormal behaviors, particularly worse a few hours after meals
Lameness, abnormal hind limb gait, “bunny hopping”
Small lumps or nodules, which may look red or swollen
Seek medical care immediately if you notice any of these signs:
Scratching or shaking the head, tender ears, or ear discharge
Cloudiness, redness, itching, or any other abnormality involving the eyes
Inability or straining to urinate; discolored urine
Weakness or exercise intolerance; rapid, labored, or open-mouth breathing; sudden-onset of weakness
Noisy or labored breathing
Partners in Health Care
DNA testing is a rapidly advancing field with new tests constantly emerging to help in the early diagnosis of inherited disease even before your cat shows symptoms. For the most up-to-date information on DNA and other screening tests available for your pal, visit www.Genesis4Pets.com.
Your Selkirk counts on you to take good care of her, and we look forward to working with you to ensure that she lives a long and healthy life. Our goal is to provide you both with the best health care possible: health care that’s based on your pet’s breed, lifestyle, and age. Please contact us when you have questions or concerns.
Bell JS, Cavanagh KE, Tilley LP, Smith FW. Veterinary medical guide to dog and cat breeds. Jackson, Wyoming. Teton New Media; 2012.
Gough A, Thomas A. Breed Predispositions to Disease in Dogs and Cats. 2nd Edition. Wiley-Blackwell; 2010.
Feline Advisory Bureau. Inherited disorders in cats – confirmed and suspected [Internet]. [cited 2013 May 6]. Available from: http://www.fabcats.org/breeders/inherited_disorders/persian.php
Hamza J, Hannon M, et al. Breed Profile [Internet]. The Cat Fanciers’ Association, Inc. [cited 2013 May 6]. Available from: http://www.cfainc.org/Breeds/BreedsSthruT/SelkirkRex.aspx
Addie DD. Genetic and Hereditary Conditions of Pedigree (Purebred) and Domestic Cats [Internet]. [cited 2013 May 6]. Available from: http://www.dr-addie.com/breeds.htm#p