Fish treats? Yummy Chummies. I don't know what Oreo is not allowed to have, so I am going to add a list of the ingredients, just in case there is something to which he is allergic.
Ingredient List: Wild Alaska Salmon, Wheat Flour, Vegetable Glycerin, Propionic Acid, Natural Smoke Flavor, Citric Acid, Garlic, Calcium Carbonate, Natural Mixed Tocopherols, and Rosemary Extract.