My male (1 1/2 years old) recently will not eat all of his food. He eats half of his servings (1 of 2 cups) and has loose stools. He is also dragging his butt in the grass after he goes out. He usually woofs everything down immedietely. He has been on natural balance for a little over a month after switching him off of nutro natural choice. I was thinking of switching again to try canidae to see if the food is the problem. Had no probs on the nutro but im staying away with all the rumors flying around. Any other suggestions of what it could be besides the food?