Grind oatmeal in processor to make a coarse flour. Set aside in small bowl. In food processor, whirr tuna with the oil, and water then add all the rest of ingredient. Pulse till mixture forms a ball, Pulse to knead for 2-3 minutes. Knead on floured surface till it forms a soft ball of dough. Roll out to a 1/8″-1/4″ thickness. Cut into shapes. Bake on lightly greased cookie sheet , at 350 for 20-25 minutes. Cool completely.