I live in an area with eagles, hawks and owls. Signs are frequently posted for lost pets, all small ones. In my heart, I know where they went ...
If your neighbor decides to keep Zoe, to help her through the remainder of her life, perhaps something like this would be helpful?
http://cgi.ebay.com/DOG-WHEELCHAIR-D...QQcmdZViewItem
It's not even that expensive. She could still run and play. And of course, give plenty of love. I hope he considers it.