Sable collies I know these posts are old.. but I think I should clear a few things up about the sable or sable merle collies. Someone posted that a sable is a sable... not true. There are many different sable types. There are pure for sable, sable merle, tri factored sable, golden sable, mahogany sable, etc. The white collie pictured in a post above is not a double dilute merle. That is a white collie with sable merle markings. A double dilute is all white with just a hint of merle around one eye or on the ears only. Their noses and areas around their eyes are usually pink. They come from breeding two merle dogs together. (True with any breed). If one parent is a non carrier of eye disease, you will not have any eye problems out of these collies... that does not guarantee no hearing issues though. Most double dilute dogs are born with or will develop eye or hearing problems. Now, to clear up what colors collies and shelties are. Sable, sable merle, pure for sable, tri factored sable, white factored sable, tri and white facotred sable, white facotred sable merle, tri factored sable merle, white and tri factored sable merle, tri color, white factored tri color, blue merle, white factored blue merle, and white (with sable, sable merle, blue merle, tri (any can be tri factored as well). What does factored mean? If your collie is white factored, it will produce white and white factored offspring when bred to another white factored dog. Tri factored is the same. To get merle, you only need one merle parent because merle is dominant.