Vitakraft Kracker Sticks contain only top quality ingredients with specially selected fruits and seeds plus vitamins, minerals, and honey all triple-baked on a wooden chew stick.After the treat is gone, he can continue gnawing on the stick.These all natural treats are nutritious and stimulate your guinea pig's natural zest for activity and his instinctive urge to forage for food.Attaches to cage wire with plastic hanger.