Dogs LOVE Sweet Potato
And why not? It's a good carb!
You can pay up to $10 for a bag consisting on maybe 3 potatoes at your local pet store, or you can do this :)
Preheat oven to 250°F.
Wash the sweet potato or yam (the very orange type).
Cut down the middle lengthwise.
Then cut long lengthwise slices about 1/3 of an inch wide and place on a cookie sheet in a single layer.
Bake in oven at 250 F for about 3 hours.
You can also use your dehydrator for these in this heat, if you have one.