TRURANCH Collagen Rolls - 6" Collagen Rolls for Dogs - Long Lasting Healthy Joint Support Dog Treat - Rawhide Alternative - Skin & Coat Health - Made with Real Beef, 1 Bag, 4 Count

These bones LAST (at least for my 55lb Black Mouth Cur). I've bought another brand's bones for a couple years because my dog only likes bones she can actually eat (and taste good) and so having ones that last and can't be eaten like a Milk Bone is crucial to me. I didn't actually think she would even like these because they're very different her norm but she's loving them! I bought 3 packages of the other bones and now I wish I had gotten several of these instead to last her a week or two. So far, these last her at least around 2 hours which is crazy. I also got bully sticks to try this week (in the name of long-lastingness) and she couldn't be less interested - These are, in my opinion, as good as it gets for dog taste appeal, durability against consistent chewing, and not making a terrible mess like some products do. I was honestly just hoping they'd last 30 minutes or so but again, they last hours. The bone she is chewing now was given to her about 3 hours ago and has like.. almost all of it left, and she's been busy at it nearly the entire time besides a potty break!