Cathy--I don't know the details of your cage set-up, but if there's a way to utilize an electric "hotwire" it might be very effective against raccoons. I had an old "FidoShock" unit that I hooked up to some wires around my tree cage and it immediately put an end to javelinas getting inside. It won't injure people and it's a great deterrent for critters.
I also have a friend who uses one to keep round-tailed ground squirrels (these are little guys that don't jump very high; I don't think it would be effective against the big, fluffy-tailed kinds) and pack rats out of his garden. He installed a fairly low (3'?) chicken wire fence with a hotwire strung on insulators along the top. When rats or ground squirrels try to climb over, they have to touch the top wire and immediately decide they'd rather be somewhere else.