Preheat oven to 350 degrees.
In a blender, pulse oatmeal until it becomes has flour consistency.
Place the oatmeal flour, whole wheat flour, egg, coconut oil, water, cinnamon, and ginger in a mixing bowl.
Use a mixer to combine all the ingredients until well blended. You may need to use your hands to get everything well combined.
Using a rolling pin, roll out the dough to about ¼ to ½-inch thickness, according to your preference.
Using a cookie cutter, cut out the dog treats and place them on a non-stick baking sheet or a baking sheet lined with parchment paper or silicone baking mat.
Bake at 350 degrees for 20 to 25 minutes.
Place the baked treats on a wire rack to cool completely.