If your dog has allergies, you can substitute rice flour, coconut flour or any other type of flour that is suitable for his digestion. You could also substitute quinoa flakes in place of the oats, if need be. Flaxseed or ground sunflower seeds could be used in place of the oat bran.
Preheat your oven to 350˚ F.
Mix all of the ingredients in a large mixing bowl. Add more flour if the dough is sticky. Divide the recipe into dough balls that are appropriately sized for your pooch.
Place the dough balls on a well greased cookie sheet. Flatten them until the are about 1/4″ thick. Bake the treats in your 350˚ oven for 15-20 minutes. You’ll know when they are done, because they’ll begin to brown and the tops will look cracked.