hammerdwarves
also you can set up upright spikes (1x wooden spear) on each tile of the room and hook them all up to a lever (lots of mechanisms). have to lever set to pull on repeat.
this will train them in dodge shield and armor use as well as get rid of a bunch of annoying pets.
if there are injuries they'll be minor but i wouldnt do this without a rudimentary hospital.
this will help you out a LOT in an evil biome.
also trians shields if they have them