My two big guys, Stump and Emmett, eat Purina One Chicken and Rice dry food daily and seem to be happy with it. (Emmett especially loves to play "food hockey" with it on the kitchen floor; if no one plays with him, he knocks a few pieces out of the dish and starts whacking them around the floor! He also likes to have me toss the food in the air so he can catch it in his mouth.) At dinner time I give them a small amount of wet food that I buy at Fresh Fields (Whole Foods Market). The brand is Lick Your Chops and they like the turkey and brown rice flavor. Yes, it's way more expensive than other brands, but I know that they're not eating a lot of preservatives or by-products. I also use a filter on my kitchen faucet, so yes, my guys get filtered water too!