Rawhide Knotted Bone for Large Breed Dogs Encourages oral hygiene by maintaining strong teeth, gums and controlling tartar and plaque buildup. Reward your dog with this treat in appreciation for their good behavior or even when they are bored. Rawhide treats come from the inner layer of cow or horse hides. During manufacturing, the hides are cleaned and cut or ground. Then they’re pressed into chewable dog treats of different shapes and sizes.