Pepper gets extremely excited once you step outside for her walk, which results in pulling. We attempted to use food to reinforce good behavior, but most of the time she wouldn't even take it. Therefore, food isn't reinforcing in that context. It's not something she is willing to work for. So what is? Moving forward! Once she learned that pulling made the walk stop, but walking without pulling meant we kept going, she walked much better.
Jeff Dentler, CPDT-KA, IAABC-ADT, FFCP, CTDI