No, Flat-Coated Retrievers do not change color significantly as they age. They typically maintain their glossy black or liver-colored coats throughout their lives, but it’s not uncommon to notice some changes as they age. While they don’t change color dramatically, you might see a few silver or gray hairs sprouting around their muzzle and face as they get older. This change is a natural part of the aging process and not a true color change of their coat.