1. Peel the sweet potatoes and/or apples. Thoroughly remove the core on the apples (bad for doggies). Slice the potatoes into thick rounds (1/8-1/4 depending on size of dog). For huge dogs you may want to slice long ways so they just don't swallow the small pieces whole. You want them to chew! Slice up the apple into size appropriate pieces.
2. Place sweet potatoes & apples onto dehydrator racks and dehydrate at 105degress until they are hardened up - about 8-12 hours.
3. Put them in a bag in the fridge or container in the cupboard. Sit - good boy!