Chicken Flavored Dog Biscuits

2 1/2 teaspoons dry yeast
1/4 cup warm water
1 teaspoon salt -- optional
1 egg
1 cup chicken broth -- slightly warmed
1 cup whole wheat flour
1/2 cup rye flour -- optional
1/2 cup cornmeal
1 cup cracked wheat
1 1/2 cups all-purpose flour

In a large bowl, dissolve yeast in warm water. Add salt, one beaten egg, and the warmed chicken broth. Add all flour except the all-purpose flour and mix well. Slowly add all-purpose flour until a stiff dough is formed and it can be kneaded by hand. Knead for only a couple minutes, just enough to get the dough to hold together.Roll out dough about 1/4" thick and cut with cookie cutters, Place biscuits on a large cookie tray and place directly in a 300 degree oven, they don't need to rise. Bake for 45 min. and then turn off the oven. You can let them sit in the oven overnight and in the morning they will be real hard and good for your dog's teeth. You could also vary this recipe by adding milk for a milk-bone type biscuit or shortening for a little extra fat. Try different liquids and even honey or molasses, Check with your veterinarian for any other nutritional suggestions.