Background: Several studies have revealed that exocrine pancreatic insufficiency (EPI) is an inherited disease in German Shepherd Dogs (GSDs). Pedigree analyses have suggested an autosomal recessive inheritance model.
Objective: Test mating of 2 dogs with EPI.
Animals: A sire and dam purebred GSD both with EPI and a litter of 6 puppies.
Methods: Test mating and long-term follow-up of offspring. The pancreas was biopsied via laparotomy on 26 occasions. Serum trypsin-like immunoreactivity was measured. Study was approved by Animal Ethics Committee.
Results: During the 12-year study period only 2 of the 6 offsprings developed pancreatic acinar atrophy (PAA). In 1 puppy, end-stage PAA and in the other puppy partial PAA was diagnosed.
Conclusions and clinical importance: PAA is not a congenital disease in GSDs. This study provided evidence that PAA is not inherited in a simple autosomal recessive fashion.