What do possums eat ?
I used to have a opossum at my house, and it would sneak up on my porch and eat all the dog food and scavenge through our garbage...(never leave your door open on a summer night! They like cat food, too and are not afraid to come inside and get it!)
Out of the trash.
Whatever they find. They are scavengers.
Anything, probably mostly plants and smaller animals like mice if their not near humans