Bengal Cat Health: PRA-b, HCM & Enrichment Needs

By Sarah Bennett, Certified Animal Nutritionist

The Bengal is a strikingly beautiful hybrid breed, developed by crossing domestic cats with the Asian Leopard Cat (Prionailurus bengalensis). The result is a cat with the wild aesthetic — rosette and marbled coat patterns, muscular athletic build, luminous green or gold eyes — combined with a domestic temperament in well-socialised lines. Bengals are high-energy, highly intelligent, and emotionally demanding. They are also prone to a specific cluster of hereditary and infectious health concerns that owners must proactively manage. Here is what you need to know.

Progressive Retinal Atrophy Type b (PRA-b): A DNA-Testable Blindness Gene

Progressive Retinal Atrophy type b (PRA-b) is a hereditary eye disease found specifically in Bengal cats and caused by a mutation in the CEP290 gene. The condition follows an autosomal recessive inheritance pattern, meaning a cat must inherit two copies of the defective gene — one from each parent — to develop the disease. Cats with one copy (carriers) have normal vision but can pass the mutation to their offspring.

PRA-b causes progressive degeneration of the rod and cone photoreceptors in the retina. The earliest sign is typically night blindness (nyctalopia), as rod cells — responsible for low-light vision — degenerate first. Over subsequent months to years, cone cells deteriorate as well, resulting in complete blindness, usually by age 3–5 in severely affected individuals.

A validated DNA test is commercially available. Responsible Bengal breeders test all breeding cats and avoid PRA-b/PRA-b pairings. When acquiring a Bengal kitten, request copies of both parents' PRA-b test results. There is no treatment or cure for PRA-b, but cats that go blind from this condition can adapt remarkably well in a stable, consistent home environment.

Hypertrophic Cardiomyopathy (HCM)

Like most pedigree cat breeds, Bengals are susceptible to Hypertrophic Cardiomyopathy. HCM in Bengals does not have a single well-characterised mutation like the MYBPC3 variant in Maine Coons, which limits the utility of current DNA tests for this condition in the breed. Echocardiographic screening remains the primary tool.

Bengal owners should begin annual cardiac ultrasound at age 2. Bengals with confirmed HCM require careful management: their high energy and tendency to engage in vigorous activity can place additional strain on a compromised heart. Your veterinary cardiologist will advise on activity modification and any indicated pharmacological management.

Flat-Chested Kitten Syndrome (FCKS)

Flat-Chested Kitten Syndrome is a structural deformity seen in Bengal neonates in which the thorax is abnormally compressed, giving the ribcage a flattened appearance rather than the normal rounded cross-section. Severely affected kittens struggle to breathe and nurse, and many do not survive the neonatal period. Mildly affected kittens may recover spontaneously as they grow and the ribcage expands, though they should be closely monitored by a vet.

The exact genetic basis of FCKS in Bengals is not fully established. Breeders with experience in the condition often note it appears sporadically rather than following a simple Mendelian pattern. If you are breeding Bengals, work with a vet who has neonatal feline experience and be prepared for intensive supportive care — supplemental feeding, positioning support, and warmth — for affected kittens.

Tritrichomonas Foetus: A Common Gastrointestinal Parasite

Tritrichomonas foetus (TF) is a protozoal parasite that colonises the large intestine of cats and is disproportionately prevalent in Bengals, particularly those from catteries or multi-cat environments. TF causes chronic, intermittent large-bowel diarrhoea that is frustratingly resistant to standard anti-parasitic treatments. Stool is typically soft, malodorous, and may contain mucus or blood.

Diagnosis requires a specific PCR test on faecal samples — TF is often missed on standard faecal float or direct smear. The antibiotic ronidazole is currently the most effective treatment, though it can have neurological side effects at high doses and must be used under strict veterinary supervision. Environmental decontamination is also important, as TF can persist in moist environments.

Any Bengal with chronic loose stool that fails to respond to dietary modification or standard anti-parasitic treatment should be tested specifically for Tritrichomonas foetus.

Enrichment: Not Optional for Bengal Wellbeing

Bengals are working-level intelligence animals. Without adequate mental and physical stimulation, they develop behavioural problems — destructive activity, aggression, and stress-related illness including psychogenic alopecia (stress-induced over-grooming). A Bengal in a barren environment is an unhappy and unwell Bengal.

Minimum enrichment requirements: at least two 20-minute interactive play sessions daily using wand toys or feather lures; a cat wheel or large climbing structure; window perches with outdoor views; puzzle feeders for all meals; and ideally a safely enclosed outdoor space or leash-trained outdoor access. Bengals kept as sole pets in unstimulating environments are at high risk of chronic stress.