Happy Birthday Three Tier Cookie Cupcake Dog Treat Assortment. Give your dog a Happy Birthday gift with this assortment of treats. Each box comes with one Happy Birthday Three Tier Cookie and four mini celebration cupcakes, all in an assortment of colors. Box Dimensions: 5"x5". Flavor: Peanut butter dough. Coating: Yogurt, peanut butter or carob and human grade nonpareil balls and sprinkles. Ingredients: Peanut Butter, Whole Wheat Flour, Canola Oil, Cinnamon, Oats, Eggs and Honey.