Combine carrots, eggs and garlic. Mix until smooth. Add dry ingredients. Roll out on heavily floured surface and cut into bars or any desired shape.Brush with egg white before baking for a glossy finish. Bake at 300 degrees for 45 minutes or until desired crunchiness. The centers will continue to harden as they cool. In general you should store dog treats the same way you would homemade people cookies. That being said, there are two main variables that determine storage time- the amount and type of fat in the recipe and your local weather conditions. If your recipe uses fats such as butter, or meat bits or juices then it will be more prone to rancidity than a recipe that uses some vegetable oil or shortening. Your treats may mold or spoil much faster in humid or very hot climates.