So... I've started this game in a on an aquifer (was fun digging trough it) good-calm biom... Now - it is boring, so I am planing to bring fun to a higher level.
Any enemy that happens to come to lvl3 cavern gets killed, any poor elephant that stumbles to the outside gets killed. No goblins! No wars - only occasional vampire (that imediately gets recruited to the vamp squad) and were-hyenas from time to time. It is boring...
So, now I am planing a surprize party for elves when they aprear in spring

I've constructed a special room with depo access just for them, that can be sealed with floodgates. Also there is a pit next to it which walls can be lowered - yes you guessed it right - filled with presents

So far I've captured dozen unicorns, few elephants, lava man and a cave crawler... Now I am thinking - is it safe for me to just dump them from 1lvl above the pit? Are they going to escape? I know every time I try to move unicorns they escape. I would not like for that to happen to me with let's say a cave crawler...
Is there some other way except for linking them to a lever? (it would take a lot of mechanisms and time).