I had a severe rat infestation in a coop. After I moved the birds and started renovating the coop the rats poured out from everywhere. There were dozens of rats, too many to trap. I resorted to using poison. I used the rat bait bars in a rat bait box. The only critter that can get to the bait is the rats and mice. The bait box I have has a little window above the bait so it can be checked regularly. I keep it loaded and haven't had any activity in a long time. I also had tunnels around the coops. I didn't find dead rats laying around. I suspect they went into their tunnels and died. I put the bait boxes in our barn which is right behind the coops. The rats found them. Good luck with whatever you do.

