I have an 8 month old chinook which is about the size of a German Shep. And he doesn't seem to be gaining weight. I adopted him about a month ago from a canine academy and he has stayed the same size. I can see his ribs so I'm a little worried but he was checked out by a vet right before I adopted him. I contacted a vet in my local area and they said to give it some time but I have given it a month. I also leave him alone in my house while I'm at work and he chews everything up. I have tried everything I can think of but I don't like keeping him in a kennel all day. Any suggestions?