Here is another recipe for dog biscuits; this one is in the book "Natural Health for Dogs and Cats, by Drs. Richard and Susan Pitcairn.

Mix dry ingredients and seeds together. Add oil, molasses, and all but 1 Tbsp. Of egg/milk mixture. Add more milk if needed to make firm dough. Knead a few minutes, let dough rest 1/2 hour or more. Roll out to 1/2 inch. Cut into shapes and brush with the rest of the egg/milk mixture. Bake on cookie sheets at 350 degrees for 30 minutes or until lightly toasted. To make biscuits harder, leave them in the oven with the heat turned off for an hour or more.