Nuisance Bear

We have a black bear in the neighborhood that has developed a taste for my neighbor's chickens. He tore the back door off of the chicken house last night and helped himself to a couple.

Aforementioned neighbor is going out of town for the weekend and leaving his wife home alone. Most of the rest of the half dozen or so families in my circle are going to be gone as well.

This leaves me as on call chicken defender if Mr. Bear comes calling. I don't particularly want to kill it, I'm just looking for a means of deterrence.

Any input appreciated.