Opossums are omnivores, meaning they will eat almost anything. However, best results can be obtained with something stinky, like canned cat food, rotten eggs, fried chicken, or other fatty fried foods.
But be prepared to catch a skunk, as skunks are attracted to the same foods. Visit Releasing a trapped skunk to learn how to release an unwanted skunk.
Resources: (online)
Opossums
Skunk Control
Skunks
