I just got a 3 month old German Shepherd Rottwiller mix yesterday. He is very cute and cuddly. But I did notice last night that when he lays down he breath's really heavy and fast. I called the animal hospital because out of 3 puppies that I have raised, this is a first for me. Well, the pet hospital told me that it was nothing to worry about, he started doing it again tonight. He acts like he was abused before, his nose is completely dry; not cracking though; and he breaths very hard and fast. What should I do? Or what could it possiby be? Any guesses or answers, please help. ~~~>worried dog lover.