Supa Dog is a cheap and cheerful food,a good guide to the contents of the grub is how prominent the meat content is on the bag,if its not in the first two or three mentioned in the ingredients its basically a cereal filler with soya etc,,if you feed this give additional meat and bones,I feed Beta Greyhound ,with raw rabbit,, veg chopped and mixed with giblets into a pudding,a couple of eggs thrown in ,cod liver oil caps daily ,in the winter , and as a change a big tin of Pilchards in tom sauce each week. The problem with the cheapies is, as Skycat said earlier ,you end up giving the dogs