Provides mental stimulation to help keep your dog's mind alert. Level of difficulty 3, for the more advanced treat hunters. Easy to clean, simply rinse under water. A pleasant and rewarding time for you and your dog. Hide the treats in the flaps and watch as your dog has to pull them out to release the prize. Suits dogs of all ages and sizes. Change the difficulty by using the bone shaped pegs to lock a flap, meaning your pooch has to paw it off before getting their reward. Smoke-free home. Played once and washed.