I've been feeding my almost-5-month-old goldendoodle Hill's Science Diet, which I fed my last dog as well. I have noticed the quantity of poop Gus generates is higher than I would have expected, however. I am giving him about 3-1/2 cups per day and he gets a lot of Red Barn raw food as part of his training (at least half cup per day). I think I have the quantity of food balanced alright... Gus is a nice weight, you can feel his ribs but he's not too skinny. He just generates a lot of poop. A friend recommended something called EVO; anyone have experience with it? I am trying to stick with a kibble-type food and also get something that is widely available.