Pour hot water over margarine. Stir in powdered milk, salt, sugar and egg. Add flour, 1/2 cup at a time; mixing well after each addition. Knead 4-5 minutes. Add more flour if necessary to make stiff. Roll 1/2 inch thick, cut with favorite cookie cutter. Put on greased sheet. Bake 45 minutes at 325ºF. Shop from home - Pet Superstore 1-800-PetMeds Best Selling Flea & Tick Products |