Hi Sophia –
Are you talking about real bones or dental chews?
As far as real bones, most are quite high in fat due to the marrow. I’d stick with turkey necks, chicken necks or duck necks (raw) with the skin removed. You may be able to find some lean beef neck bones, my butcher carries them sometimes.
If you’re referring to chew type treats, bully sticks are pretty low fat. If your dog likes antlers, they’re very long lasting and since most dogs actually can’t “eat” them you wouldn’t have to worry about fat content. Himalayan chews are low fat and long lasting as well.
