You can start out with any meat...we did chicken which is cheap and easy. You will have to do both RMB and MM to begin with - depending on what type of RMB (chicken quarter, wing, neck) you choose you will need to add a certain amout of MM (chicken breast, thigh meat, gizzards, hearts). The reason being, those RMB's have different amounts of bone to them - chicken quarters have a pretty good ratio of RMB:MM, where necks are very boney. Too much bone will lead to constipation; Too much meat = runny poop. So, you will need to add a bit of MM if you were going to feed chicken necks. Each week or two you can add a new protein source (assuming your dog has had no problems with the previous meat added) until you get a good variety (then you can feed them all together or in any order). The only reason I say to wait on the OM, is that it is very rich and can also cause runny poop if you give too much. You only give a small amount at a time. We waited a couple of weeks into the diet to add that in.