Swamped

"If we were anywhere else, the thing to do would be smoke them out," you muse. "But fire and swamp gas don't mix well. Maybe the gas hasn't gotten this far down, but that's a big risk to take."

"Well, what else have we got? Poison? That's just going to work its way back to us, one way or another. And any dose strong enough to take down that many greatrats is definitely going to give us trouble."

You give a little smile.

"That's true of most poisons, but now that you mention it, I can think of one that's plentiful in the swamp, potent, and breaks down quickly when exposed to the elements."

"What, really?"

"Fly blood toxin."

"Oh, right! Yeah, the blood's deadly, but after less than a day it's safe enough to clean. Only trouble is, there may be a ton of fly eggs lying around out there in the muck, but it's not as if we can gather them up quickly. Unless you've got a plan for that."

Do you?