I give the boys raw meaty bones a couple times a week, but to be honest, I'm pretty bone-retarded. Which are best? Which aren't ok? Everywhere website I look at says something different. I get mine from a local mom-and-pop place and they get variations of elk and venison marrow bones, femurs, ribs, and knuckles. (mostly knuckles) Are any of these not ok? I don't have a ton of freezer space (ok, so really I have pretty much none) to order cases in bulk, so I just buy the ones I get at work one or two at a time. They've never had any issues.