Purina Dog Chow. He said that it puffs up in a dog's tummy and suggested we wet some in a bowl and see what happened. (We had been feeding it dry). It more than doubled its size.
well I know you are talking about DOG food, but wouldn't cat food do the same? I am not feeding them purina anymore either, and whenever a piece of the new food gets in the water bowl, it puffs up, wouldn't all dog/cat food do the same?