I have a 13 week old female. I think we are underfeeding her. She is getting 1 cup of dry dog food 3-4 times a day. She is only 19 pounds and bites a lot!! I don't mean teething biting either. Could this be why? I just read the back of a Pedigree package and it says she should be eating 2 3/4 cups right now!! Is that right and how many times a day???? Please Help!!!!