My pal used to feed his Pit Bulls tractor tires. I'm not that extreme, those things are expensive. I'd go with a big ass bone. Yes, perhaps the bone could come from the ass area of a cow. I think chicken bones splinter, and you might avoid that shit. Honestly however, there's reall no better chew toy than your feet, they learn to go after shoes that way. But there's always a good old greeny chew. They go fast though.