We bought rat traps but then found that you need to release them at least one mile from the house and that this is distressing for the rats. I also bought a rifle and shot a couple of them but this solution is the most effective by far. We sprinkled the power liberally around the compost bins and bird feeding areas where the rats had taken-up residence. For the first day or so I thought we'd made a mistake but after 3 or 4 days it was obvious something had changed. A further few days and it was clear they'd all moved out. We went from around 10 rats to none in a week. That was some months ago, only now, four months later, do we have a new rat hole, so the powder is in use again. In the meantime I keep the powder stored in the shed with the bird food on the basis no rats will try and get in there so the food stores are safe. Great product - humane, non-toxic and highly effective.