i got a chihuahua/yorkie mix and she is 4 months old. She has the hair of a yorkie. and i was wondering how long it takes to get rid of that puppy fuzz/undercoat. i been working at combing it out but its hard to do and she hates it. i just don't want to have to shave her if it gets to matted. I think it looks awful b/c she so fuzzy and it stands straight up. about from the middle to the rear. thanks for your help.