I switched my pack over to a no grain dry kibble from Iams and Science Diet. My afghan has always been slightly gassy but since the switch I have begun to have serious gas problems with him. He will clear the room, even when we are sleeping I have woken up b/c of the smell. It lingers too, to where I am searching the house to see if someone had an accident. Any ideas? We are desperate, our house is really a stinky place to be!