Which specific health condition is listed as common in the breed that responsible breeders must screen for?

Answer

Progressive Retinal Atrophy (PRA)

Progressive Retinal Atrophy (PRA) is explicitly mentioned as a health condition common to the breed that breeders work to screen against.

Which specific health condition is listed as common in the breed that responsible breeders must screen for?
rarityDogbreedTibetan SpanielCompanion animal