BelovedBirds
Crossing the Road
you drown them? Wow. Why not just relocate? Even a traditional trap would be more humane than drowning them.I have been using live traps (the small rectangular cage things--hereafter "box trap") baited with bread. The mice here really go for that bread. Just plain bread! We've sometimes gotten them with a piece of corn on the cob, and even a tomato did the trick once...but the bread seems to have been the most reliable.
I use live traps because I can't deal with the gross factor of the traditional variety. But the rodents do not survive--they get euthanized in a matter of some seconds in a bucket of water (trap and all). No returnees! (And I don't have to touch them, just open the door of the trap and toss them out.)
I think peanut butter works well in the traditional trap because it is sticky and the rat has to put a little more pressure into trying to lap at it. With the box trap, most anything can work as long as the trigger is set sensitively and at the proper angle.
The box trap has its disadvantages. If left too long, rats can sometimes have enough time to chew their way out. Furthermore, rats learn. If other rats see the trapped one, they might be less likely to approach the trap themselves. So it is best to empty it promptly. One advantage, though, is that more than one can enter at a time. We have sometimes caught two at once.
Anyway, there are cages you can get for rats, not boxes, and not plastic- metal bar cages. They're humane, they walk in, trap door closes, and then you just have to relocate and open. It generally works pretty well but some are more difficult to catch.