Heart muscle disease (HCM)
The heart muscle thickens, so the heart pumps less well. The Ragdoll has its own inherited form: about 1 in 4 tested Ragdolls carries one copy of the gene. Whether it is as common in the Cherubim has not been studied.
How it is found: The DNA test for the Ragdoll form and a heart scan by a specialist, for both parents.





