just what i was going to say, so it might not be the desirable color for show and breeding purposes but it doesnt make them less lab.

as if i get a husky with floppy ears or a blue eyed samoyed or a shepherd born with no tail, that doesnt make them less of their breed, just not suitable for breeding and/or showing, but still they are purebreds, even if some traits are genetic issues, as if people have two toned skin (i really dont know the correct name) that doesnt make them less human......