I suggest deer antlers! We received ours a few days ago and all the great things I've heard are true! My non bully dog..Dena..is a real chewer and of course, so is Jake. They have hardly put these down and they are the first ones they pick from "the toy pile"! These are real deer antlers and if you get them..I would suggest the x large. I got mediums which are fine..but I will get larger ones next time.