Thickened heart muscle (HCM)
The heart wall grows too thick, so the heart pumps less well. Many cats show nothing for years; it cannot be cured, but medicine helps. In the Pixiebob it has been seen a few times, sometimes in lines with Maine Coon or Bengal in them.
How it is found: A heart scan by a vet, every year for breeding cats. There is no DNA test for this breed.

