Dogit Snack Bar Donut Dog Treats; Duck. Dogit Snack Bar Rawhide & Treats are all-natural and gluten-free, providing a delicious outlet for your pet’s natural chewing instincts and the added benefit of promoting good oral hygiene. Wrapped in real duck 100 % Natural Gluten-Free No Sugar added Available Sizes: 2 Piece Pack: 7.6 cm - 8.8 cm (3" - 3.5") 1 Piece Pack Large: 13.9 cm - 15.2 cm (5.5" - 6")