PetSafe Busy Buddy Fun Durables, Treat Dispensing Rubber Dog Chew Toys DURABLE RUBBER: Indulge your dog's desire to chase and challenge his mind with this entertaining treat toy ADD TREATS: Encourage your dog to play longer by filling with treats or kibble that fall out as he plays; smear with peanut butter for extra fun CUSTOMIZABLE: Treat Meter opening can be trimmed to control how easily your dog can get to his treats inside EASY TO CLEAN: Just place in the top rack of your dishwasher SAFE PLAYTIME: PetSafe toys are made of safe, non-toxic materials. We hold our products to extremely high standards of safety and craftsmanship and design them with safety in mind SIZE INFORMATION: Small size is slightly smaller than a tennis ball and recommended for dogs under 20 lb. HERE TO HELP: Call, email or chat with our expert U.S.-based customer care specialists Monday through Saturday at 1-800-845-3274 or ccc3@petsafe.net; they are ready to assist you and your pet