They're beef ligament, chicken breast, and something else. Dehydrated. Of course, they're not mixed together. One kind is Beef Ligaments. One is Chicken Breast. Ect. I gave one to Taz, and he but off HUGE chunks of the beef ligaments. Is that safe? I've got another one for Sam, but I'm worried about giving it to him - his jaws have a heck of a lot more power then Taz's.
Found it! They're actually called Muscle Bones.
Webby site :: http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=528
Thats not it, the Muscle Bones web site is currently MIA - but they are made in the USA. And those on Dr. F/S are basicly the same thing