In reply to fmck:
> Eh! How can a glue board be more cruel than poisoning it to death or trapping it from triggered wire?
The snap traps are (usually) instant death. The glue traps don't kill the mice/rats; they die slowly of starvation and/or dehydration. Rodents are known to chew limbs off to escape them. The poison is probably cruel as well, but I don't know as much about it.
http://www.humanepestcontroltips.com/sticky-glue-mouse-traps
There are also electric zapper traps to kill mice/rats, but at the end of the day killing them is usually ineffective at removing a rodent problem. No-one has 'a rat' or 'a mouse' in their house; you either have none or lots (barring the occasional rodent who walks into an open door or something.
The key to dealing with a rodent problem is to rodentproof your house (or at least food areas). You only get rodents where there is a food supply. In Cardiff when I was a student quite a lot of student properties had mice; these were old (1880s) buildings with a selection of dodgy bits of building work. Usually it was the pipes going through walls under sinks; a can of expanding foam seals up the hole around the pipe. You can also stuff wire wool into small crevices that a mouse might enter. It doesn't matter if the mice can get into your walls from outside; if they can't make it to the food, then you shouldn't get a population. Rats are bigger and therefore easier to keep out.