Puppies will have milky bluish-gold to amber eyes until a few months old. The coat color comes in liver or chocolate (shades of brown). DNA testing of these three autosomal recessive diseases can absolutely identify genetic carriers (one copy of the gene) and at-risk (two copies of the gene) individuals. The breed also has a susceptibility toward inherited heart disease, eye disease and patellar luxation. Before being used for breeding, dogs should be tested for hip dysplasia, hereditary eye disease, heart/cardiac abnormalities (specifically pulmonary stenosis), hereditary patellar luxation, hereditary exercise-induced collapse, degenerative myelopathy, and Collie Eye Anomaly.