I never used one before though! There are other kinds, like ones where you try to get the raccoon to go in the cage and the door closes, but I think raccoons are smart enough to evade a lot of covered traps. They just reach in and grab the bait.
Check out this link:
http://www.theeggtrapcompany.com/
That's one type there is, and here's the thread found the link in:
https://www.backyardchickens.com/t/213519/egg-traps-any-experience
Good luck catching those little bandits! I'd look into some traps, so you don't have to wait around for them to show up. There are a bunch of different kinds.
None better than my coon hound, though
I would still work at making the area more secure for the littlest ones.
And...