The title says it all, It's happened before and we managed to catch them all with humane traps for release a long way away, but the whole town is infested so they're never gone for long. we're doing the same this time and we've already caught one since baiting the traps this afternoon, but I was hoping one of you marvellous horticulturists might know of some sure fire way of stopping this from happening again. Obviously we want to avoid poison, as we plan on using the compost to grow fruit & veg, and having a bunch of dead, toxin filled rats contaminating the compost is unlikely to improve either their taste or nutritional value. Please tell me there is a solution.