Fish them. The only downside is if your house is within 100ft or so you'll smell it too. A small price to pay.
An old favorite. Go purchase 2 whole unprepared fish at your local seafood market. Bury said fish into 2 different spots about 1ft deep. Somewhere where it's tough to tell you dug a little hole. Wait a couple days and step outside to enjoy the aroma. I always recommend two separate holes because they think they found it, then 2 days later when it still stinks, they find the second fish. If fish aren't your style, I participated in a Turkey-ing some years back, it was even worse.