University of California at Davis Veterinary Genetics Lab DNA test results: (Copies of these parent results are included in all Kitten Folders and are available for viewing.) PK Def: N/N (Pyruvate Kinase Deficiency [Inherited Fatal Anemia Disease]: Negative/Negative....Not even a carrier. PRA: N/N (Progressive Retinal Atrophy [Inherited Blindness Disease]: Negative/Negative...Not even a carrier.)