From best-dog-treat-recipes.com

Ingredients for Halloween Peanut Butter Dog Treat

1 1/2 cups whole wheat flour
2 tablespoons wheat germ
1 1/2 teaspoons dry yeast
1/4 cup cornmeal
1/3 cup peanut butter
1 cup water
1 ¼ cup white flour
1 teaspoon cinnamon
1-2 tablespoons tumeric
1-2 tablespoons beet powder

Directions for Peanut Butter Holiday Dog Treats

Place all the ingredients in your bread-maker, according to the manufacturer’s instructions. The tumeric and beet powder are for coloring. You can use more or less, depending on the intensity of color that you want to get. If you combine the yellow tumeric and the red beet powder, you will get a shade of orange.
Coloring Because I use whole wheat flour, I also get brown tones. If you substitute unbleached flour for the whole wheat flour, you can use less tumeric and beet powder to get an orange color. Also, if you are not an absolute purist, you can use yellow and red food coloring to get the color that you want—instead of beet powder and tumeric. Or use a mixture of the two.

When the dough is ready, roll it to a 1/4” thickness.
Cut a circle with the cutter, then press the plunger to emboss each cookie.
Using a spatula or flipper, place the cookies on a lightly greased cookie sheet.
Bake the dog cookies for 1 hour at 300 degrees F.
Turn off the oven and let the cookies dry in the oven overnight. They should be hard and crisp, not soft or giving. Turn them over once to let the underside dry thoroughly.