You can get bully sticks at Petsmart and Petco- just have to look hard. I get a brand called Red Barn?? I think...

Tobey LOVES them!! They aren't super cheap but worth the money because one will last a really long time. I usually give it to him for about 30 minutes at a time and then put it up cuz the end gets all gummy..and kinda gross looking..but it gets hard again. He has never loved any other chew so much