I have not met one, but it could happen, I suppose. A Border Collie can be yellow And likely has recessive as well as dominant black, genetically (their close cousins do!). read more
If a dog gets the “yellow” gene it makes no eumelanin in the coat, if it gets the recessive black gene, it makes no phaomelanin in the coat, and thus is a white dog. This is the genetics that cause white in Samoyeds and some other breeds. read more
Breeding two dog that are NOT white factored but both have white extending over their eyes and/or ears MAY produce puppies with a higher incidence of hearing problems and/or deafness. 8. White on the head, shoulders and/or front legs does NOT indicate white factoring. read more