They are not good animals to have around. While they may kill and eat rats (along with anything else) that they find in nests, they should not be considered predators.

If they are located in close proximity to us, they can incur damage by finding any sources of food that they can: pet food, bird seed, garbage, etc. They not shy about breaking into garages or sheds, or even homes.

They also carry a heavy load of parasites and diseases with them, many of which can be passed to us, our pets, and other wildlife.

In non-urban or suburban setting, they are able to co-exist with others, but better watch out for the hen house!

I don't think you'll sell too many people on the idea that 'possums are a great way to control rats. ;-)

Opossums are fantastic animals to have on your property. They do indeed kill rats and mice, snakes, and they are among the most efficient destroyers of disease carrying insects, such as ticks. If you see one creeping about your place at dusk, don't let your dogs or cats bother it and leave it alone. Being diligent about guarding and sealing up trash and pet food stored or left outdoors is a good practice whether you live where there are opossums, skunks, bears, raccoons, or stray cats. It's not their fault. It's your responsibility as a home or property owner.