HI, have been trying for years to trap them and finally had to give up when they would steal the bait no matter how much i smashed it in the trap.....So am now using ONLY the poison that is a *blood thinner*. I routinely add liquid chlorophyl to the dog and cat food (source of fit K, health food store sometimes grocery pharmacy). the cats still try to kill and eat,then throw up the smaller ones....but they don't get sick if they were easily caught because they are dying.
The rats were climbing the chain link, killing then trying to drag my half grown and one grown chicken thru....They have also been tunneling around some of my big trees putting my coops in danger of toppling in the next big wind storm.....no these are not mole tunnels. I bricked in with 12 x 12 pavers the coop floors and they would tunnel under and then the pavers would tip creating open ways...... I built several upside down 3" T-tubes 18" in each direction. I would string bait blocks on a wire and insert in the top, replacing when gone.....This has finally given me relief. All my closed youngster area chain link walls are being replaced with 1" x 1" cage fabric....
Unfortunately must keep the bait traps loaded because new ones seem to take the place of the dead ones. don't place them in the coop thou incase the rats accidentally drop a few crumbs where the chickens can find them.........
Best of luck, eliz
Where do you live? Is it in the country? What a nightmare.