Heartfelt Care: Understanding HCM in Sphynx, Lykoi, and Devon Rex Cats
November 15, 2023

For the passionate cat enthusiast, understanding the unique health nuances of different breeds is paramount. Hypertrophic Cardiomyopathy, or HCM, is a term that might ring familiar to many who delve into the feline world, especially when considering breeds like the Sphynx, Lykoi, and Devon Rex. As a potential or current cat owner, knowledge of this condition can not only help in early detection but also in providing the best care to your feline friend. In this comprehensive guide, we'll shed light on HCM, its implications for the aforementioned breeds, and the proactive steps to ensure a cat's healthy and fulfilling life. 


What is HCM?

Hypertrophic Cardiomyopathy (HCM) stands as the most common heart disease in cats. It's characterized by the thickening of the heart muscle, particularly the ventricular walls, without any apparent cause. This thickening can hinder the heart's ability to pump blood efficiently, potentially leading to other complications like congestive heart failure. 


Although the exact causes of HCM in cats remain a topic of ongoing research, certain genetic factors and predispositions have been identified, especially in particular breeds. Given its silent nature, many cats with HCM might show no obvious symptoms until the disease has progressed significantly, underscoring the importance of early detection and regular health screenings. 


HCM in Sphynx, Lykoi, and Devon Rex 

When it comes to heart health in felines, not all breeds share the same risks. Though any breed of cat can develop HCM - Sphynx, especially, has a noted predisposition to HCM. While it's essential to approach this with caution, it's equally crucial to have an informed perspective. 


Sphynx: This breed, celebrated for its hairless beauty and affectionate nature, has a well documented history with HCM. Research suggests that a significant percentage of Sphynx cats can develop this condition, with genetics playing a pivotal role. Diet and environment can also play a role in the development of HCM. Currently there is only one genetic marker that has been discovered for HCM in sphynx. And is thought to be responsible for up to 60% of the documented cases of HCM. It is believed that there is one additional genetic marker that is responsible for the remaining 40% but has not yet been discovered. There is still a lot of research that needs to be done, in regards to the HCM gene(s). But should still be used as a tool in breeding. That is why it is still so crucial that proper screening is done yearly. 


Lykoi: Often referred to as the "werewolf cat" due to its unique appearance, the Lykoi's relationship with HCM is still under study. However, initial findings highlight a potential genetic linkage to the disease, making it a point of attention for breeders and owners alike. Yearly screening is recommended. 


Devon Rex: With its large eyes and elf-like ears, the Devon Rex is a breed many fall in love with. But like the Sphynx, there's a known correlation with HCM. While not as pronounced as in the Sphynx, Devon Rex owners should remain vigilant about regular heart screenings too.


It's essential to note that while these breeds might have a predisposition, it doesn't guarantee the onset of HCM in every individual cat. Responsible breeding practices, health screenings, and early detection remain the best defense against this heart ailment. 


Signs and Symptoms 

Awareness is the first line of defense against many health conditions, and this is especially true for HCM. Recognizing early warning signs can be the difference between timely intervention and irreversible complications. Here are some symptoms cat owners should keep an eye out for: 


Difficulty Breathing: Cats with HCM might exhibit labored breathing or breathe rapidly, even when at rest. 


Lethargy: A noticeable decrease in activity levels or a reluctance to play can be indicators. 


Faint or Collapse: In advanced cases, the cat might faint or collapse due to decreased oxygen circulation. 


Loss of Appetite: A sudden disinterest in food or weight loss might suggest a possible heart issue. 


Heart Murmurs: While not always a definitive sign of HCM, heart murmurs detected during vet check-ups could be indicative of the condition. 


It's crucial to understand that these symptoms can also be associated with other health issues. Hence, regular veterinary check-ups, including heart screenings, play an indispensable role in early detection and accurate diagnosis. 


Treatment and Management 

When faced with an HCM diagnosis, many cat owners might feel overwhelmed. However, with appropriate care and management, many cats diagnosed with HCM can still lead long, comfortable lives. Here's how:


Medication: There are several drugs available that help manage HCM symptoms. Beta blockers and calcium channel blockers, for instance, can help relax the heart muscle and reduce the heart's workload. 


Dietary Changes: A low-sodium diet can assist in reducing fluid buildup in cats with HCM. The absence of taurine in the diet is known to cause heart disease in cats. Always consult with your veterinarian about the best dietary choices for your feline. 


Regular Check-ups: Regular veterinary visits are imperative. They allow for the early detection of potential complications and adjustments to treatment plans as needed. 


Stress Reduction: Minimizing stress is vital. A calm, stable environment can reduce the strain on a cat's heart. Consider creating a serene sanctuary or using feline pheromone diffusers to promote relaxation. 


Stay Informed: As research on HCM progresses, new treatments and insights might emerge. Stay updated and maintain open communication with your vet. 


Remember, while an HCM diagnosis might seem daunting, with the right approach and dedicated care, your beloved feline can continue to thrive. And if you're ever in doubt, seeking a second opinion or consulting with a veterinary cardiologist can offer further clarity and peace of mind. 


New research and treatment for HCM: HCM Treatment


Conclusion 

Hypertrophic Cardiomyopathy (HCM) might sound intimidating, especially when associated with cherished breeds like the Sphynx, Lykoi, and Devon Rex. However, with awareness, regular screenings, and informed care, managing HCM becomes less daunting. 


While some breeds have a predisposition to HCM, it's vital to remember that each cat is unique. Not every individual will develop this heart condition, but being equipped with knowledge ensures that you're prepared should the need arise. 


Until the other genetic markers are discovered - we may never eradicate HCM completely from our cats. The best tool we have is to track our pedigrees/lines and to screen all of our cats yearly for HCM. To include cats that are no longer in our breeding program & pet siblings of our breeding clan. We encourage all of our adopters to do the same as it is important for us to track our lines for health. 


If you're considering welcoming one of these stunning breeds into your home, or if you're already a proud cat parent, prioritize their heart health. Regular vet visits, early detection, and a loving environment can make all the difference.


If you're searching for a kitten with a strong lineage and thorough health screenings, consider Royal Velvets Cattery. Our commitment to feline health and well-being stands unparalleled.

October 10, 2025
At Royal Velvet , we want every kitten to start life with the best protection possible — which is why each of our Sphynx , Devon Rex , and Lykoi kittens goes home with 30 days of free Trupanion pet insurance. Bringing home a new kitten is exciting, but even the healthiest, most well-bred cats can experience accidents or sudden illnesses. With Trupanion, you’ll have peace of mind knowing that if something unexpected happens, you’re covered from day one. πŸ’• What Does Trupanion Cover? Trupanion provides coverage for: Accidents & Illnesses : From tummy troubles to injuries, Trupanion covers the cost of diagnosing and treating unexpected conditions. Hospitalization & Surgery : In case of emergencies or major health issues. Medications & Diagnostics : Covers prescription treatments, imaging (like x-rays and ultrasounds), and lab tests. Congenital & Hereditary Conditions : Especially important for breeds like the Sphynx and Devon Rex, which can be predisposed to certain genetic conditions such as HCM (Hypertrophic Cardiomyopathy). Chronic Conditions : Lifelong issues like allergies or skin sensitivities can also be covered. What’s not covered: Pre-existing conditions or routine wellness care (like vaccines or parasite prevention). πŸ’² How Much Does It Cost After the Free 30 Days? Trupanion’s cost varies by breed, age, location, and deductible . You get to choose your deductible, which affects your monthly premium: Lower deductible = Higher monthly cost Higher deductible = Lower monthly cost On average, cat owners report plans ranging between $20–$40 per month , but it’s personalized to each pet. We recommend calling Trupanion directly or visiting their website to get an exact quote for your area and breed. πŸ† Why We Trust Trupanion We’ve partnered with Trupanion because they: Offer instant activation on your kitten’s pick-up day (no waiting period!) Pay 90% of eligible vet bills directly to your veterinarian Have a 24/7 customer service team who truly cares about your pet It’s one of the best ways to protect your kitten and your peace of mind — right from day one. πŸ’¬ Final Thoughts We’ve seen firsthand how valuable pet insurance can be — especially with unique breeds like Sphynx and Devon Rex cats, who deserve royal-level care. Activating your free 30-day Trupanion policy ensures your kitten is protected the moment they join your home. After that, you can choose to continue coverage for lifelong protection and peace of mind. πŸ’– Ready to activate? πŸ‘‰ Call 855-266-2156 or visit Trupanion’s website and use our partner code BR1RV80219 to enroll your Royal Velvet kitten today.
October 2, 2025
Bringing home a Sphynx , Devon Rex , or Lykoi cat is an exciting journey into the world of rare and exotic breeds. These unique cats require special care, and as responsible pet parents, it’s important to understand their needs. This care guide covers everything from skin care to nutrition, helping you give your royal companion the healthiest, happiest life possible. Why Exotic Breeds Require Special Care Sphynx, Devon Rex, and Lykoi cats are very different from typical domestic breeds. They often require veterinarians who are familiar with their unique traits, health considerations, and care routines. At Royal Velvet, we stress the importance of education and preparation before welcoming your exotic kitten home. Essential Facts & Care Tips 1. Coat & Skin Sphynx cats have little to no hair, while Devon Rex and Lykoi cats have fine or sparse coats. Hair thickness and texture can change depending on hormones, seasons, and environment. Their skin produces natural oils that aren’t absorbed by fur, which means they may need occasional baths. But please do not over bathe!! Washing more than once a month is too often and can cause the skin to overproduce the oils. Use Hypoallergenic PH balanced shampoo (never baby shampoo). Avoid sunscreens or lotions — they will lick these off. Instead, use UV sun shirts or lightweight clothing, but allow the skin to breathe. Pro Tip : Many owners say their Sphynx smell like warm potato chips when cozy! 2. Nose & Sinuses Unlike other cats, Sphynx lack nasal hairs, which makes them prone to sneezing. Mild sneezing is normal, but colored discharge, coughing, or wheezing require veterinary care . 3. Ears With no ear hair, Sphynx and some Devon Rex/Lykoi cats collect more oil in the ear canal. Clean weekly with Zymox Cleaner and cotton swabs (never deep inside). Watch for itching, redness, odor, or head shaking, which can indicate infection or mites. 4. Eyes Sphynx kittens open their eyes early (1–5 days old), and without eyelashes, they are prone to tearing. Clear tearing is normal, but colored discharge or squinting requires a vet check . 5. Whiskers Many exotic cats (especially Sphynx) lack whiskers. They may use their paws like hands to sense depth or dip their feet in water to gauge levels. 6. Teeth Sphynx kittens may have brown-stained baby teeth due to porous enamel that absorbs natural oils while nursing. This is harmless and disappears as adult teeth come in. 7. Nails & Grooming Declawing is not recommended — Sphynx and Devon Rex use their paws almost like hands. Trim nails weekly and clean nail beds with baby wipes to remove trapped oil. Bath only when visibly dirty, not on a fixed schedule. 8. Diet & Appetite Exotic cats often have big appetites and fast metabolisms. Keep high-quality food available at all times. Provide access to fresh water (not milk). We recommend: Purina ONE Kitten Dry Food Fancy Feast Wet Food NuVet Plus Supplements for immune and digestive support 9. Litter & Hygiene Best options: Okocat pine pellets or paper pellets. Avoid dusty clay litters — they may irritate sensitive noses and skin. Use metal or ceramic bowls instead of plastic to prevent chin acne. 10. Warmth & Comfort These breeds feel warmer to the touch but have the same core temperature (101–102.5°F) Provide soft blankets, heated beds, or safe clothing in colder months. 11. Parasite & Health Care Fleas are less attracted to hairless cats, but protection is still important. We recommend Revolution for broad parasite control (fleas, ticks, mites, roundworms, mosquitoes). Routine deworming and yearly vet visits are essential. 12. Vaccinations Give kittens time to adjust before additional vaccinations. Stress can trigger sneezing or watery eyes. We recommend spacing vaccines: FVRCP and rabies should not be given on the same day. 13. Heart Health – HCM Hypertrophic Cardiomyopathy (HCM) is a serious heart condition common in Sphynx, Devon Rex, and Lykoi cats. At Royal Velvet, all breeding cats undergo yearly scans with a veterinary cardiologist . Pet owners should continue annual screenings for peace of mind and proactive care. Final Thoughts Sphynx, Devon Rex, and Lykoi cats are extraordinary companions that deserve extraordinary care. With proper nutrition, hygiene, veterinary oversight, and lots of love, your kitten will thrive as the royal family member they were born to be. For more resources, explore our educational blogs: πŸ‘‰ Proper Kitten Introduction to Their New Home πŸ‘‰ The Ideal Diet for Your Exotic Kitten πŸ‘‰ Common Viruses in Kittens & How to Handle Them πŸ‘‰ Heartfelt Care: Understanding HCM in Cats At Royal Velvet , we are always here to answer questions and guide you through every step of life with your exotic companion. πŸΎπŸ‘‘