Okay, Andy (9 wk old sheltie) has been getting Nutro Ultra Puppy food his entire life. I feel like I've given it time to work, but he is having more problems as he is getting older. He has a bowel movement at least 4-6 times a day and lately he has been scratching uncontrollably. He doesn't have fleas. His stools are firm and compact, but he goes so often! Anybody have a favorite brand? I really think I'm gonna switch him. I think I can do better.