Whatever you use for a trap, it should still be humane. I don't care what it is or what it's done, these are wild animals that only see another animal they can use for food. They are not doing anything personal to make anyone mad. Even mink and weasel, although we think that they are just killing for fun..they really aren't, they are storing their kills for use at a later time. Using a rat trap to try to catch a mink...or anything..is cruel. I doubt a mink would go anywhere near a rat trap anyway. It is always best to just use whatever means available to predator proof your run, coop, or premises where your birds run. It makes me sick and sad when they kill our birds, as I said, but I would never use anything but humane methods to dispose of any unwanted critter, and, except in extreme cases (like the one with our mink) I will try anything else first to discourage the predator, and have been successful doing so many times.
I've seen hawks flying around and they all go under the coop. When they go free ranging for the day, I close up wherever a snake may get in. (The air holes. The screen on the windows is too small for any snake to get into.) We live in a rural area. We have a huge yard and no neighbors but plenty of wildlife. We are building a very large fenced area for the birds very soon. (2 weeks at the most.) We may electrify it to keep everything but humans out. We also just bought 5 more guineas from Cackle Hatchery, our 2 guineas right now are already learning to roost in the trees. Our guineas are like watchdogs, if they see or hear a predator they screech and everyone takes off. If it's hawks or eagles, they're under the coop, if it's a snake, they're running away or picking it up and eating it if it's small enough. There are no opossums or raccoons during the day. (Thank God!) We're watching the dogs and making sure the run and door are closed while they free range, and we're setting their food and water outside. 
