Bombay Cat Health Problems: An Honest Guide

The Bombay is a handsome, affectionate breed that often makes a robust, long-lived pet — partly thanks to its hardy American Shorthair ancestry. But because it was developed using the Burmese, it can also inherit some of that breed's specific health considerations. This is an honest, factual guide to the conditions a Bombay can be prone to, what the evidence does and does not tell us, and how good breeding and care reduce the risks.

A note on the evidence

The Bombay is a relatively uncommon breed in the UK, so there is less large-scale, breed-specific health data than for popular breeds. Much of what we know comes from research on the closely related Burmese, plus general feline health knowledge. That means it is important not to overstate rare conditions: a breed *carrying* a risk does not mean every cat will be affected, and responsible testing exists precisely to reduce those risks. Where evidence is limited, this guide says so.

Burmese hypokalaemia

The best-documented inherited condition relevant to the Bombay is Burmese hypokalaemia, also called familial episodic hypokalaemic polymyopathy. It causes episodes of low blood potassium, which lead to muscle weakness — classically a wobbly gait, difficulty walking, or trouble holding the head up. Signs often appear in young cats, frequently within the first months of life. The condition is inherited in an autosomal recessive pattern, meaning a cat must inherit two copies of the faulty gene to be affected; carriers with a single copy show no signs but can pass it on. Crucially, a DNA test exists, so breeders can identify carriers and affected cats and breed responsibly to avoid producing affected kittens. Many affected cats can be managed well — sometimes with potassium supplementation under veterinary guidance — and in some, signs become milder as they mature. If you ever notice your cat walking oddly, seeming weak, or unable to lift its head normally, treat it as an urgent reason to see your vet.

The craniofacial (brachycephalic) tendency

The Burmese line carries a separate inherited issue: a craniofacial defect affecting the skull and face. In its mildest form, this simply contributes to the shorter muzzle and rounded head seen in some Bombays and Burmese. In its most severe form — when a kitten inherits two copies of the gene involved — it causes serious deformities of the head that are incompatible with life, and such kittens do not survive. Responsible breeders understand this and avoid the pairings that risk it. For owners, the practical point is twofold: choose a breeder who breeds for moderate, functional head shape rather than extreme features, and be aware that very flat-faced cats of any breed can have breathing, dental or eye issues, so a balanced, healthy face is preferable to an exaggerated one.

Hypertrophic cardiomyopathy (HCM)

Like many cats, Bombays can develop hypertrophic cardiomyopathy (HCM), the most common feline heart disease, in which the heart muscle thickens and works less efficiently. It can be silent for a long time before causing problems, so report any breathlessness, lethargy, reduced appetite or sudden weakness to your vet promptly. Ask your vet about appropriate monitoring, and favour breeders who heart-screen where possible. HCM is a general feline risk rather than something unique to the Bombay, but it is worth keeping on your radar across the cat's life.

Dental disease

Dental and gum disease is extremely common in cats and easily missed until it is advanced and painful. Signs include bad breath, drooling, reluctance to eat hard food, or pawing at the mouth. Build dental care into your routine — brushing with cat toothpaste if tolerated, dental-friendly products, and regular veterinary dental checks. Our dental care range can help. Good dental health protects not just the mouth but overall wellbeing.

Weight and obesity

The most common everyday health problem in pet cats is simply carrying too much weight. Excess weight strains the joints and heart and raises the risk of diabetes and other conditions. Bombays are food-motivated and affectionate, which can make over-treating tempting. Feed a good-quality, complete diet in measured portions rather than leaving food down all day, and judge condition by body shape — ribs easily felt, a visible waist from above. Our cat portion control and obesity guide and the pet calorie calculator help you get it right. You can also check whether a particular human food is safe with our can my pet eat this tool. A slow feeder can help an enthusiastic eater pace themselves and a water fountain encourages good hydration.

Reducing the risks

• Buy from a health-testing breeder who DNA-tests for Burmese hypokalaemia and avoids risky craniofacial pairings — see our cost and buying guide.
• Keep your cat lean and feed measured portions.
• Prioritise dental care from a young age.
• Have regular vet checks, moving to twice-yearly as your cat ages.
• Insure early, before any condition can be excluded as pre-existing.
• Watch for warning signs — weakness, an odd gait, breathing changes or loss of appetite all warrant a vet visit.

For more on the breed, see our guides on lifespan and health and whether Bombays make good pets. You can find local and emergency clinics through our vet finder.

*This is general guidance, not a substitute for advice from your vet, who can assess your individual cat.*

Sources

• International Cat Care — inherited diseases in cats, including hypokalaemia and HCM (icatcare.org).
• Governing Council of the Cat Fancy (GCCF) — breed information and health testing (gccfcats.org).
• RVC VetCompass — UK cat health and longevity research (rvc.ac.uk/vetcompass).
• PDSA — cat health, dental and weight care (pdsa.org.uk).
• Blue Cross — caring for your cat (bluecross.org.uk).