Put white flour, wheat flour, rye flour, bulgur, corn meal, dry milk and salt into a bowl. Mix well with a wooden spoon. Dissolve yeast in 1 cup warm water (110 degrees to 115 degrees). Add yeast to dry ingredients. Add broth to flour mixture. Stir until dough forms. Roll out dough to 1/4-inch thickness. Using a large dog biscuit for a mold, cut out shapes. Grease cookie sheet with the Crisco. Place biscuits on cookie sheet. Brush on egg glaze. Bake 45 minutes. Turn off heat. Leave in oven overnight to harden.