I like how invasions can be different, but that does sound like an oversight. I don't even have tamed animals except for some lox in a separate location... There's got to be better solution than using windmills for traps or somehow confining the animals into some bunkers. <_>

I don't really like requesting features, but having some AI for the animals to make them properly flee or go to a "rally point" during certain types of invasion would probably do the trick. Taming is already such a chore, it doesn't seem right that all the work can be undone by bats of all things.