I just got a full blooded pit bull puppy about 3 weeks ago. The person I got her from only fed her bread and sometimes nothing at all. Her rib cage is showing really bad. I do not know what to do. I've been feeding her nothing but dog food since I've had her. I feed her 2 times a day and she still has ribs showing. It looks like it got worse. What can I do to get her ribs to stop showing and get weight on her body??