I give my 4 month old the elk antlers from the petstore and he loves it! I try not to give too much rawhide and the antlers are awesome because he can chew and chew and it doesnt disappear in 5 minutes haha. I think that he'll let you know if theyre too hard, he'll stop chewing on them if theyre hurting him at all. Sarge loves his! Hope this helps!