I finally recieved results of Riva’s gene test from Optigen and it confirms that he is prcd-PRA affected. Eventhough it is sad to have confirmation that he is sick, the news are also a relief because now we know for sure what we are dealing with. The heredity of prcd-type PRA is known and there is a gene test. His offspring will not develop PRA and the breeders can continue the line if they wish, they just need to pick mates that are non-carriers for prcd-PRA.