Canadian Brand. Rollover Meaty Pork Femur Bones are all-natural pork femurs with the meat left on the outside and the marrow on the inside, then baked for your dog's chewing pleasure. The fact that pork bones are softer than beef bones and are approximately 6-7" in length makes this bone best for smaller breeds and delicate chewers. Each Meaty Pork Femur Bone is individually shrink-wrapped to ensure freshness.