I've heard Innova is really good.

I feel my dogs Nutro Ultra. Molli eats about 1 1/2 cups a day of food and she's only supposed to eat about 3/4 a day, and I can't seem to get her to gain an ounce. (she's a little on the thin side, but a good weight overall) So I don't know if that's good weight loss food or not? But she gets a good amount of exercise and is very active indoors. Her poops are healthy and she doesn't poop a lot either. (lol)