[Lord Vulcher]

Hello guys, I'm a little stuck. In Soulstorm Brewery (can't remember where)there is a part with fleeches and some Mudokons. I cannot save the Mudokons as the fleeches keep eating them. They eat them when I pull the trapdoor and then the fleeches just devour them before I can get them through the portal. If someone knows how to save them please tell me. I would be most grateful.