Simply place a treat in the Zanies® Giggle Peek-A-Treat pet ball and challenge dogs to get it out. Pet ball provides a great way to ease boredom, alleviate stress, and keep dogs mentally stimulated and challenged. Unique design of pet ball features a transparent window in the center of the toy to give dogs a tantalizing view of the treats. Two air vents inside the pet ball emit hilarious giggle sounds whenever the ball is rolled or shaken to capture dog’s interest. Adjustable opening in pet ball allows insertion of different sized treats and can be increased or decreased in size with a simple twist to make it easier or harder for dogs to retrieve treats. Ball is made of durable, non-toxic plastic with a colorful bone design.