First offer your cat to destroy the rats population in the yard or try to rid rats by yourself. If your pet does not want to do it, you can use natural and electronic repellents for the yard, as well as poison rat baits, which fatally dehydrate rats. In addition, there are many rat traps includes old school snap traps & live-catch traps, but we recommend paying attention to modern electronic rat traps, which are more humane in comparison with other types of traps. Read about the most effective ones in the review of 5 best electronic rat traps.