food is not just food lol when you are looking at a dog food you want to see meat or meat meal and better yet both of these as the first 2 items listed. You don't want corn, wheat or soy or animal digest in any food you feed. The first three are known allergins to dogs and the animal digest is just nasty..( google it). You don't want a grain heavy food and you want a single protein.
There are several food I wont feed because they are low quality kibble..Iams, Eukanuba, Science Diet, Hills, Anything Purina, anything bought in the grocery store or discount store iE: Kibbles and Bits, Beneful, Dog Chow, gravy train, Alpo..and the store brands. Read the back of the bags and you will soon realize what low quality food is being offered for your dogs..watch your treats as well..most of the treats are full of crap as well. Feed carrots as a treat..or frozen melon balls and give raw chicken wings or ox tails or marrow bones as a snack.