Bison Marrow Bone - 4"People have been asking us for something long lasting, something that will "keep their dog busy" when they leave the house, "give them a break while they work from home", and we've heard you~ Introducing, our Bison Marrow Bones! True to our Winnie Lou brand, we are utilizing even more of our local, Colorado Bison with hindshank and femur marrow bones. From the slow roasted bison on the outside to the rich, delicious marrow on the inside. Our new bison