I'm thinking of firing up my smoker next time, just to make dog treats. My house oven is only so big, and I usually have a crap ton of spent grain. Might as well use it all up, and see if we can't make some money with it! I figure it would work out well, since you don't have to worry about food alergies.
My smoker is an insulated cabinet, so it only varies by 2 degrees from top to bottom. I think this would work well.