Outside, given changing weather conditions, we suggest you place a moisture resistant paraffin-covered rodenticide block in rat burrows. Maintain an uninterrupted supply of fresh bait until there is no more evidence of activity (chewed bait). There are two effective methods to determine if the rats are still active. One is to block the openings into the burrow. If you see that some of the openings have subsequently been re-opened, the rats are still active in that area. A second method is to attach the rodent cakes with wire and then check their feed intake.
Inside your home, the first step is to find the openings through which the rats are entering and take the necessary steps to close them quickly. Breaks around pipe entries are often the source of the problem. To eliminate rats, we suggest you use Maheu&Maheu Glue Traps
in cardboard boxes and mechanical traps along vertical surfaces. Use peanut butter rather than cheese as bait because peanut butter dries out less quickly and rodents love it.
Use of rat poison inside is not recommended. In fact, contrary to popular belief, there is no product on the market that can dry out a rodent's body without leaving an odor.