Here are a few links.
http://www.twodogpress.com/dogfood.html
http://gourmetsleuth.com/moredogtreatrecipes.htm
http://gourmetsleuth.com/recipe_dogbiscuit.htm
http://www.geocities.com/NapaValley/2049/doggie.htm

From: " >
Subject: Dog Biscuits recipe sought
Date: Friday, August 25, 2006 10:59 PM

OK, I haven't had luck on a web search. In the past I have seen a
recipe for making one's own doggie treats. Basically wheat flour,
garlic powder for the stinky value, and whatever to bake into a firm,
dry, cut-out biscuit. But I can't find it/them now. Anyone have a
recipe?

I'm the foster father at a distance of a cocker spaniel in New Orleans,
a Katrina storm survivor. Long story. Paid some bills for care and
medical, can't take him home cross-country, at least just now. So I
want to send a personalized care package to his step-mom, including
treats for the mutt and others in the nest.

Next I need to investigate how bad it is for dogs to travel in an
airplane baggage hold. But that's another story.

So, anyone have a recipe for doggie biscuits?