It probably has been discussed before, but for the life of me, the search feature doesn't give me some good results.
I have played over 50 games in DF and when the 1st werecreature appears, it all goes south.
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Guys I'd love some insight please.
I know losing is !!fun!! but it would be nice if I would not lose "again" next time from that 1st werecreature.
I must say you were unlucky if the werebeasts. Really unlucky (50 times? I haven't played that many forts in my life). Just after reading this post I had my FIRST werebeast in my current fortress, and it was in year 9, in mid-autumn. It killed one freshly naturalised elf, and bit a scholar visitor (who was later credited with the kill of the werebeast, since he was the last to punch it before it bled out, and being bitten himself, carried the curse out into the world), but it was dispatched by a single trained soldier with a pickaxe. The werebeast missed every hit directed at the soldier, because he was trained so well, and lost several limbs to the pickaxe.
So apart from the wood-collecting elf and the cursed visitor there were no casualties, despite sizeable lumbering operation, 300 citizens, 150 visitors and hundreds of animals. This it to be expected with well trained military. But it still was my mistake, because I already have walls with a dozen of gates, but neglected installing the watchdogs near the gates. I don't care about thieves (they all target the same artefact deep in the fortress, so all will fail), but have forgotten about the possibility of beasts.
Installing animals near gates (either a chain or pasture) is the best detection method. There are known solutions for watchtowers, which have animals safely kept (e.g. behind windows, raised above ground to prevent building destroyers), but they have relatively short range, I'm not sure how well they work in current version.
Obviously you need a way to keep closed, as stated in other posts it is enough to be able to turtle for a short period (two days).
Only biting by werebeast transfers the curse (in vanilla), so if someone was bit, he is cursed, but if was only hit or scratched then not (but to be sure isolate them anyway).
Also, the werebeasts attack only if you have population of 20+, so if they are your main nemesis, you can try to build defences before hitting this number.