Unless you bag a moose, trying to bite around the bones of a similar ungulate is somewhat annoying when you are attempting to have a nice meal. For the most part, you get a hell of a lot of bone and not a lot of meat out of a deer cage. Several options are available, many of which have been suggested above, but so far as I have seen, nobody has suggested a good stew! Lop those cages up and make a stew with them. Add some more firm pieces, but the ribs, when slow-cooked in a stew crockpot, will make a real hearty gravy base, and a thick stock with which you can create a truly amazing stew without having to resort to the use of starch as a thickener. Trust me on this one, you will not disappoint your dinner guests!