Here is one we did for our pup Merlin

2 1/4 cups whole wheat flour
1 1/2 Cups all-purpous flour
1 1/2 cups corn meal
3/4 cup uncooked regular oats
1/3 cup instant non fat dry milk powder
1 table spoon garlic powder
1/2 teaspoon salt
1 3/4 cups beef broth
1/2 cup vegetable oil
2 large eggs
1 tablespoon worcestershire sauce

Preheat oven to 300 F

Combine the first 7 ingredients; make a well in the center of the ingredients.

Whisk together broth, oil, and 1 egg; add to dry ingredients, stirring until a soft dough forms. (from experience its a pretty tough dough to knead)

Roll dough to 1/2 inch thichness on a lightly floured surface. Cut with any cookie cutter you like depending on dog size, and place on ungreased baking sheets.

Whisk together remainding egg and worcestershire sauce, brush on cookies.

Position oven racks to divide oven into thirds. Bake at 300 F for 2 hours, placing a baking sheet on each rack. Turn oven off, and let cookies stay in oven with door closed for 2 more hours.

This will make a bunch of small cookies.

Enjoy