I use beef, chicken, and lamb bones but no pork.
For recreational chewing I use knuckle and marrow bones, put them in the freezer to make them last longer. I don't worry about stripping the bones, neither of my dogs have ever had a issue eating the meat and skin off them
Jasmine - Female Miniature Poodle - born Aug 15, 2010
Loker Delgado Von Stalworth - Male GSD - born Jan 26, 2012
Koda & Zazu - 6 year old male cats
Alex - Male Cocker Spaniel (rescue) - RIP Cuddlebug 2007-2010