I've never been a supporter of the whole duckotron thing. Tell ya what, though, I'll move all the ducks into another area before I conduct the mass slaughter. My plan is to use AnimaRytak II's tomb as animal storage, since someone already packed it full of dogs and cats, and dig a tunnel to the volcano, flooding the room and incinerating the bodies. The coffin and door are both magma-safe, so there shouldn't be a problem.
One slight update though - I'm at late Spring, and we've been sieged. 3 squads, and 9 military dwarves left. The only access to the surface I can find is through the 3-z-level hallway of cages, but if anyone knows of another that could pose a risk, tell me now. Also, I've started to put down most of the ghosts, and have begun moving the stockpiles down closer to hell in preparation for my reordering of the upper levels. I'll have a full update at the end of summer.