Is there any reason to give cats supplements while feeding a homemade raw diet? I know some cats have problems with bones and need the calcium pills, but what about the other minerals, vitamins, taurine, etc.?
It's usually a calcium powder, not pills. Thankfuly--pilling a cat can be such a pain! I think most raw feeders supplement with taurine, because it's so important and you can't really overdose. Omega 3s are a good idea unless you feed grass-fed/pastured meat. Whether that's in oil form or by feeding sardines. I'm sure there are other supplements used for cats with specific conditions.
All the other vitamins and minerals are supplied by the meat and organs.
These animals probably were fed bones that where too big. I never feed my cats any bone that I cannot cut with pruning shears. Bones from chicken, duck, partridge, quail, dove, small rodens and so on are fine to feed to cats. I'm always carefull with rabbit bones however. The leg bones can be quite tough and a rabbit skull can only be eaten by a very experienced cat. I never feed bones from geese, turkey, lam or any other animal that is bigger than a large chicken. These simply are not suited for a cat.I read a lot of cats and dogs break their teeth by eating raw bones, so it is always better to use bone meal for safety reasons.