My opinion on IAMS ---
I'll never promote it or buy it. They're absolutely aweful to their dogs that they test the food on. Ive heard stories of the scientists cutting giant wholes into the dogs body to see how the food supports the muscle growth. They also attach window-type devices to the dogs stomache to watch and observe digestion. These dogs are not sedated or numbed. They lay on the floor in pain. Its mainly beagles that get it.. but I'm sure there are other types of dogs as well that get experimented on. When Iams is done with the dog, they kill them on the spot. Bullet to the head (if they're so lucky).
I know its a PETA thing.. even though I think PETA is absolutely crazy, I think they have a few good points. This being one of them.
IamsCruelty.com