So the co-op I use offer blue ridge beef products they do grind products for the most part... the protein/bone grind are about 30% bone so my question is for the most part is... ill change the grind with bone out monthly to a different protein beef/venison/chicken/quail/rabbit/pork/ 1-2 more but... with it being 30% bone and say I feed 4 lbs right now to my mastiff how much would I have to add to to get 10% I cant seem to figure it out