The Bravest Warriors have a new pet Sort of. Can he fetch? Roll over? Balance a treat on his nose? Ummm ...Not so much. The Bravest Warriors have a new pet Sort of. Can he fetch? Roll over? Balance a treat on his nose? Ummm ...Not so much. Actually, Yeller ('coz he's loud ) may not be an actual dog at all. Maybe. But he can do this: --grow from a teeny-weeny puppy into a full-size dog(?) in just a few hours --make Wallow's hands morph into paws --say...