I feed mine lots of game and venison, on the bone, with the usual offal ration, and some left overs from my dinners, as well as mackerel, and at this time of year I am getting sprats too... but even with this, I have found the dogs can loose condition if working daily which mine usually are. I know lots don't have their dogs out every day. I can keep my dogs in way better condition by additional fats, which I get free from butchers, just meaty/fatty off-cuts that they chuck away... works for me lol