Possums have livers, too, so God obviously intended possoms to drink.
Next time you're out drinking, share your whiskey with a possum.
It's the natural order.
1. Lot's of animals drink fermented apples. Just check all the drunken moose threads.
2. For animals that don't regularly have access to fermented apples, perhaps the liver exists so that the possums have something to strive for. God does have a plan, and it is reasonable to assume that he prepares his creations to take advantage of it.