Raw diets for large dogs/ mastiffs?

i pretty much took the line of asking myself "if my dog was here with no humans, what would he eat?" and primarily i kept coming back to small animals such as chicken or similar birds and rabbits or similar rodent types. The easiest, cheapest, and simplest method then was feed him chicken. That means ALL of the chicken (NOT cooked), organs, meat, and bones. Since they don't sell the chicken with organs (normally) I buy the chicken gizzards, hearts, and liver separate. Grain feeding is just plain crazy and the irony is raw feeding is not only healthier but cheaper once you figure out the best places and most economic ways to buy it. So more like 90/10 mix being chicken with bone/organs. No sense buying any meat separate from bone as it then complicates you figuring out how much bone to get AND it is more expensive. I do alternate sometimes with turkey and beef also just to keep some variety but same philosophy of 90% meat WiTH bone to 10% organ meat and not just one organ as they have different qulities so make sure you do give heart AND liver and suggest a 3rd organ too.