Chicken Dog Biscuts for your best friend

3 1/2 cups flour
2 cups whole wheat flour
1 cup rye flour
2 cups cornmeal
2 cups cracked wheat
1/2 cup non-fat dry milk
4 teaspoons salt
1 package dry yeast
1 pint warmed chicken stock
1 egg
1 tablespoon milk


Dissolve yeast into warm chicken stock
Mix flours, cornmeal, wheat, milk, salt, and yeast together.
Knead about 3 minutes, working it into a stiff dough.
Roll out on a floured surface to 1/4 inch thickness.
Cut into shapes, place on cookie sheet
Mix egg and milk together
Brush egg mixture on to biscuits
Bake at 300 F for 45 minutes
Turn the heat off and leave the biscuits in the oven overnight.
They should be hard and dry.