A werepanther arrives at the site of an aspiring castle fortress. It saunters around the wilderness, eating some random crocodile in the process, then leisurely swims across the river and pounces at the first worker. I hastily draft everyone who knows what he's doing (with two metal pointed sticks and three crossbows it wasn't much at all) and issue a charge order. Much bloodshed ensues. The thing bites dorfs in half until it runs out of steam and they mob it (adding insult to injury, it was a human child). A few dozens of corpses are hauled away, the wounded are counted. Not willing to risk episode two I dig out an emergency hospital and wall out all survivors there. Lo and behold, a month later two guys flip, finish off the rest and fight to the death. I figure "oh cool, a therianthrope manager is a direct upgrade from a vampire one! Still no need to feed or water him since he just regenerates himself every month, and for the same reason there's no alcohol withdrawal either!"
Some time later the command chain gets disrupted for some reason. Apparently the chair composing his "office" got broken. Oh well, might be another side effect of that one incident with a stuck door. I order a set of leaden furniture dropped down there for shits and giggles, narrowly avoiding boinking the happy owned on the dome with a pair of 375kg presents. He sets them up and proceeds with his job. Until it gets disrupted again. The imbecile turned into a panther, scratched at his table a few times doing absolutely no damage, then turned back into a dorf and continued to kick and punch it until it actually broke from his fists. Now one part of me thinks it wasn't an upgrade at all, and maybe I should just euthanatize the stupid bastard for breaking his own bed on his own damn volition. And I need a new manager too.