YippyYappy Refillabone - 3 pack - Small - for dogs up to 25 pounds (Small) Simply add a couple of teaspoons of your dog's favorite food, freeze the whole bone and food, and give whole bone with frozen bone as a treat Your dog will spend many minutes licking, chewing, and gnawing on the bone to get the food out. Excellent calming effect compared to the normal "treat-gulp-look at you for next treat" event Perfect method to give your dog treats if on a vet diet plan - just use the vet recommended food as the frozen treat Multiple cavities in the bone hide food to make this long lasting. Tough USA made, safe plastic, lasts for many many uses.