Bengals have two genuine breed-specific DNA tests, one for an inherited blindness and one for an inherited anaemia. There is no DNA test for heart disease in this breed, whatever a listing says. Hearts are screened by ultrasound scan.
Start with the two that are real. The first is the Bengal form of progressive retinal atrophy, an inherited blindness. Researchers recorded the earliest signal at 7 weeks on an electroretinogram, a test of retinal function, with changes visible on an eye exam between 8 and 20 weeks. Detectable vision loss usually only appeared from around 60 weeks.[3] The same team ruled out the genes behind the forms seen in other breeds, so this one is specific to Bengals and needs its own test.
The second is pyruvate kinase deficiency, which destroys red blood cells and causes an on-and-off anaemia. Signs include lethargy, pale gums, weight loss and jaundice, and they vary a lot in when they start and how bad they get. In an unbiased sample of 320 Bengals, 73 cats carried one copy and 5 carried two.[4] That is roughly a quarter of the breed carrying something worth knowing about before you plan a mating.
Both conditions are recessive, meaning a kitten needs two copies to be affected and a cat with one copy is healthy itself. So a clear result on one parent protects the whole litter, and carriers stay usable in a breeding programme rather than being lost from it.
- Progressive retinal atrophyDNA test, once in the cat's lifeRecessive. A clear result on one parent protects the litter.
- Pyruvate kinase deficiencyDNA test, once in the cat's lifeRecessive. Roughly a quarter of Bengals carry a copy.
- HeartEchocardiogram, an ultrasound scan, repeatedNo DNA test exists for this breed. Do not accept one as evidence.
- Chest wallHands-on check of every kitten in every litterCheap, fast, and the one thing only you can do.
- FeLV and FIVNegative tests before matingTwo contagious feline viruses, unrelated to the genetics above.
Now the one to refuse. Bengal listings routinely advertise “HCM tested” parents, meaning tested for hypertrophic cardiomyopathy, a thickening of the heart muscle. There is no Bengal DNA test for it. The two mutations that labs do test are specific to Maine Coons and Ragdolls. The ACVIM consensus statement, the reference document veterinary cardiologists work from, says testing them in other breeds is not recommended.[5] Bengals are listed among breeds believed to be at higher risk, but the same document notes prevalence data for pedigree cats is lacking. Screen the heart by scan, and treat a DNA certificate offered as heart evidence as a reason to ask more questions.