Maybe a goose (or even a few of them) might deter something like a possum or a raccoon...Dont know about foxes or weasels...Or cats... Or dogs....
Here people are using donkeys (big wild ones from the Bureau of Land Management when they do their mustang roundups) or even llamas (you have to either have em in pairs or with other herd creatures like sheep or goats-- there are often free or minimally expensive ones on Craigslist but while cheap to feed they can get pretty wild too)...
