My brother-in-law is in college and is usually up for house/pet-sitting our dog when we go out of town. We leave him $100, some frozen pizzas, and the menu for the local Chinese place, and ask him to walk the dog and get the mail.
Of course, my father-in-law loves our dog so much that while we were gone the last time, he came over with steaks and made one for himself and one for the dog. So when we got back, we gave the dog kibble and he looked at it and walked away. (He ate it eventually, when he got hungry enough, but still.)
Do you have any younger family members in the area who could do this?