A dog is designed so they get the most benefit from eating raw meat and raw bones. You need to decide however which way you want to feed your dog, can you cope with raw ?(your dog certainly can) or do you prefer he eats cooked meat (without cooked bones).
Once you have decided that will you be making up your own meals for him or just feeding this game as extra's?.
Once you've decided that then off you go, you are not restrained by how young your dog is it can be easily raised on these meats from day one without problems.
I give mine game occasionally only because I found it difficult to source, but now as I have contacts mine will be feed much more of it.