I'm with BB and all the other animal lovers here. Every being on this planet has the right to live, even the one's we don't like. We had rats in our loft when we lived abroad, they were climbing up next doors citrus trees and we couldn't gain access to chop them down as the owner had passed away and his children lived on the mainland so I am fully aware of what a nuisance it can be when you get unwanted lodgers, that said, my husband purchased some humane traps and set them up. Every time we caught one we took it for a drive and released it far away from the village. We managed to get in touch with the owners who came and chopped down the trees so, no more rats. Vermin is a man made label, in my opinion there are many humans who are vermin!