I wanna tell ya something smart like it's setting enough to support a cow... Ba dum bump but I won't, I know it's pretty wear resistant, my dog can eat most bone but cow shin bone lasts forever I've got bones from the dog that he's been chewing on for over a year on a regular basis.
I got nothing scientific, just observations of how tough the bone is. One thing I do notice though in really cold weather is very brittle but that might be all bone, I don't know.