I've heard vets use the "thumbnail" test to judge whether something is too hard to give to dogs. If your fingernail doesn't make a dent in it, it's likely too hard and has the potential to break teeth.
Rib bones don´t have any give to them and he loves them!
When my parents visit and we go to restaurants for dinner, I always order ribs if they have them and always ask for the bones to take home. Sometimes my mum orders lamb on the bone and I take that too.
@Shezbug Back in the UK I had a Tamaskan (A very wolf like dog), and his diet was a handful of biscuits and then I would boil up offcuts from the butchers, my ex was friends with them and he´d bring home bags full of skin, off cuts of meat, chicken feet, and a couple of bones.
I think we´ll see how he gets on the with the buffalo horn, he´s never had horns or anything like that, always been bones/feets etc Jacob does not like toys so he may not see it as ¨food¨ and might not even want to chew it..