Many of you have seen my boy, Butch, pulling my kids in the wagon I rigged up. Well, today my wife said that he was just lying around not wanting to play with the other dogs, which is very unusual. When I got home from work he didn't come running up to me, which is almost unheard of. I went looking for him and finally found him under the house completely ignoring my calls. This just doesn't happen. I went under the house and pulled him out and I noticed he had significant weight loss. I could feel his ribs and Butch has always been a very healthy dog including his weight. He just lies around and doesn't seem to want to move at all. I am VERY worried about him. Butch and I are closer than I have ever been with any other dog before. The first thing in the morning I am taking him to the vet. I know these symptoms seem kind of vague, but do any of you have any ideas what this may be. Between the lying around and not coming when called I am so worried. This just isn't like him at all. Something is wrong.