Danny White;1472334 said:
Man, that really sucks.
I have mice that die from time to time in my basement ceiling and they stink for about a week. But it's never as bad as you're describing. I usually just put out an air freshener and in a few days the smell goes away.
This will be a pain in the arse, but since it's in your pantry, you might want to try to figure out where it is and cut away the drywall and try to remove it that way.
Otherwise I'd have to say you'll have to wait it out until the thing completely decomposes.
... otherwise, even when it does decompose, you'll still have the liquified remnants of a possum that will leave a darkened, fragrant stain and odor within your walls until ,well, until you take it out. IT WON"T GO AWAY. Being inside the wall, there is not wind to remove it completely and erode the remains away from inside your wall.
Bottom line is... that nasty thing will be in there until you take it out. For sanitary reasons, and concerns for your health. I urge you, to take immediate action in removing the animal corpse from your inner wall.
You should be able to google someone that can help you with this sort of thing. Believe it or not, there are companies that deal with extracting once living, but now decomposing bodies of many sorts...
Good luck, my friend.
