I feed Pro Plan. It went from being expensive to now being ridiculous BUT my ~75 lab eats only about 27-30 lbs a month and his stools are very small. It is an efficient food and the pros really do use the stuff. That being said, the bag size has gone down to 37.5 lbs (it was 55 lbs five years ago) and it costs $64 on Amazon. So I am about $50 per month on feeding him. If you are cleaning kennels or looking for the best food, you might try that direction. MG