Why were the bodies so badly decayed so quick?
You're a survivor arent you sidney?
The rate of decay depends on different things like temperature and climate, so that might have sped the process up; but it might be a bit too soon even under normal circumstances. Though, I don't think we were ever told what the time span was in this (days, weeks or a month or so).
"I'll go,because I am Cinema!" - Ben (Man Bites Dog)
My theory is that it was summer and in the woods cause many of the corpses to decay.
Think about the first time you got laid. You just gotta go: Daddy are you sure this is right?