I live in a large old farmhouse and we had an INFESTATION of field mice a few years ago. Cat couldn't keep up. Glue traps weren't enough. Rat poison worked like a charm!
We used the stuff from Lowes/Walmart in block form and the trays of pellets. They were placed everywhere we had seen or heard mice and in a couple places where we suspected a nesting area (or an opening to a nesting area). In less than a week, we neither saw nor heard them anymore. Some places developed that salty-sweet smell of decaying rodent for about 7-14 days, but it was worth it to be rid of them.
We suspect they had entered through the bay door of the garage, which had part of its rubber foam sealing strip gone, leaving a place for entry. The door was repaired and we keep two trays of rat pellets strategically placed in the garage before the entry to the house. Someone left the garage door open overnight last summer and something came in and ate a little poison, but we don't have any signs of rodents in the house.
Of course, follow the precautions on the package w/regard to pets and small children.
