I know this is a nutso question, but lately Oliver has this weird smell about him. I have checked his ears, no sign of redness of problem there, and he is not scratching them. I have him bathed once a month, and his anal glands are checked too. It is sort of a doggie smell, but I cant pinpoint it. It usually appears about a week after grooming and bath, sort of a sour smell. His teeth are white, no problems there, maybe this is normal?..My aussie does not have this smell, and I can't remember any of my other dogs having this either. His skin is fine, not dry, and fur is fine too. He eats TOTW Roasted fowl, and does just fine on it. He used to be on the salmon one, but I noticed a fishy smell eminationg from him, and changed the food to the other. Any ideas or suggestions for us?