Border Collie with Colour dilution alopoecia Photo Credit: At the VETS Veterinary Clinic What is color-dilution alopecia? Color-dilution alopecia is a hereditary skin disease found in “color-diluted” dogs caused by the d1 allele of the color dilution gene (Kim et al, 2005). The Miniature Pinscher is one dog breed affected by this disease. Color-diluted Min …