This year we’ve had field rats in our very old pantry with an unsealed ceiling and no doubt unknown holes. We caught these rats in a big rat trap baited with peanut butter.
We could have put out rat poison but didn’t. Sadly, second generation rat poisons have replaced the just as effective first generation formulations, due to unproven concerns that rodents would develop immunity. Second generation poisons take longer -- the rodents amass a higher concentration in their bodies; birds of prey that feed on the target animals are dying at unprecedented rates. If you have a rodent problem in your home or business, please go to educational websites and read about these products with a longer half-life and greater potential to kill non target animals and then make your selection. Or try peanut butter and snap traps.