Your akc black lab puppy has 6 white hairs on his chest will this hurt him in the field trials or stud service?

Having six white hairs on your AKC black lab puppy's chest is unlikely to hurt him in field trials or stud service. While breed standards typically prefer a solid coat color, minor cosmetic variations like a few white hairs usually do not disqualify a dog from competition or breeding. However, it's always good to check with specific judges or breeders for their preferences. Ultimately, performance and temperament are more critical factors in trials and breeding.