When I got Gemini (boxer/lab) I was told to feed him Large dog puppy food... I did for a bit but then I changed him over to adult food. I made sure that it was made for large breed dogs and a word of advice that I have learned is to make sure that the ingredients are mainly made with RICE.. it will fill their belly up faster and longer anything with corn meal will go right through and it will seem like your dog is always hungry..
I don't have to feed him as often and his stools seem better too
As someone put to me ..
"when you eat cereal in the morning does this fill you up or are you starving again a few hours later?" Think of how much energy a dog burns in like 5 minutes and how much we(humans) do? wow
.. my poor puppy hahah