New never used was too small for my dog Medium Could be purchased for larger dogs to freeze treats for enrichment and to keep them busy while you’re gone. Medium Bone: Can hold up to 60 grams of treats. Freezball is our long-lasting dog bone that's also a fillable chew, providing up to 45 minutes of chewing time. Made from 100% natural rubber. Freezball is non-toxic, biodegradable, and dishwasher-safe, ensuring it's safe for pets and the planet. Veterinarians endorse the Freezball as an exceptional training tool, especially for dogs prone to chewing on inappropriate objects. Looking for a long-lasting dog bone that can keep up with your active chewer? Look no further than our new design, the Freezball! Not only can it withstand the wear and tear of tough chewers, but it's also a fillable dog chew that can keep even anxious pups happy and calm. Customizable Fillers The slow feeder comes empty, allowing you to create your own fillers or take advantage of our ready-to-use products. Simply fill it up and freeze it until your furry companion is ready to enjoy up to 45 minutes of licking and chewing entertainment. Crafted from 100% natural rubber, Freezball prioritizes safety for both your pet and the environment. These healthy, long-lasting dog chews are not only biodegradable but also non-toxic. By choosing this treat feeder for dogs, you can even reduce your carbon footprint - a win-win for you and the planet. Veterinarian Endorsed Easy to Clean