What Makes a French Bulldog Chocolate Fluffy? Cocoa Genetics and the FGF5 Coat Gene

Two puppies from the same litter can leave the whelping box looking like they came from different parents. One is a short-coated fawn; the other carries a deep brown sheen with a coat long enough to fall softly over its ears. Neither result is random. Both are the predictable output of specific genes, and once […]