Why is conformation important?
This is NOT a thread about bashing any of the lines. I'm asking a legitimate question to help me understand breeding.
I'm going to ask my question using a story. I was talking with a breeder friend of mine about a particular dog. I said that IMO that dog is the type of dog one would want to breed. He has a very nice pedigree, great work ethic, nice pack drive, good temperament, clear headed, dog( I could go on forever but you get the point). She replied that he's not a dog she would use because his tail is high, thinner bone structure, too leggy and just overall the bad conformation. This dog is not ugly by any means just not "perfect" in conformation I guess. So my question is, what does conformation have to do with breeding working dogs? Or at least what is the real relevance of it? I hope this is making sense.
Thanks in advance.