The Rat Terrier breed in general does have health conditions which should be of concern, please make sure you're purchasing a Rat Terrier from fully health tested parents. We test all our Rat Terriers for CDDY/CDPA,PLL, PRA-PRCD, and complete OFA recommended testing to achieve their CHIC# prior to breeding to ensure we do our part to not pass along affected or unsound Rat Terriers.