to a point, but if you go that route, any breed of animal is just a mutt then, at the point they breed true for all future generations then they are a breed. be it chickens cats dogs horses cows etc., just because it fits the breed description does not make it a purebred if it is half jersey giant and have orpington, its a cross breed. period I have no problem with outcrossing to improve , its done in all animals, but it takes generations of breeding back to purebred before its considered a purebred again. Most chicken people dont think that way but I do. what bothers me is when its crossbred and then represented as a purebred just because it looked like one. I see lots of black dogs in the pound that look like labs, but they arent....