Renovating a rat infested coop. I have currently around 200 birds. I have hanging feeders in my coops. The infested coop had a ceiling and inside walls. When I started removing them the rats poured out and there were also several nests. As I said previously I tried many things and still saw some rats I then I invested in the rat bait stations.I use the rat bait stations after trying many other thing first. You can put the bait stations in a pet carrier so nothing but the rats can get to it. There is a little window above the bait so it can be checked daily. I had an infested coop and when I started renovating it dozens of rats of all sizes poured out. I had noticed tunnels around my coops. I did not find any dead rats laying around. I'm pretty sure they went into their tunnels and died. Good luck...