A Rhesus Macaque has stolen half my stuff!
Solution 1:
As for what you can do now, try to survive till the next trade caravan. Then you'll be able to trade things for a new pick, which you'll need.
As for keeping this from happening?
- Traps
- Dogs
- Dogs are the best defense against macaques because the macaques will actually stay away from them.
- Marksdwarves
- They can kill the horrible monkey's before they're close enough to steal your implements.
- Wrestlers
- If you have nothing better, at least the monkey's can't steal their weapons (though they may still steal their pants).