Lots of ideas here! And thank God rats are fairly non existant where I live!!
Last night when I went to shut the girls in, i turned on the light briefly while I gathered eggs and when I did, i saw a couple tiny mice go scurrying. I have known the mice were in the henhouse from day one, figuring they're the night clean up crew for all the apilled grain, but had NO IDEA just how many of the vermin there were....
Until I tipped the one ground nest box to the side (where I had seen one run behind when the light came on) and at least 30 tiny mice burst out of a squirming pile and scattered back into the henhouse and down the two chew holes I was aware of. Oh, and did I mention that a shrieked like a little girl?? Mice don't usually freak me out bit this was a bit much! Especially for a 6x10 house.
I have seen my girls with a mouse hanging by its tail from their beaks only a couple of times, but clearly they aren't as avid hunters as I had hoped!
So I am going to try just feeding the girls outside twice a day, and maybe they'll just eat more bugs, and set a few live traps inside with grain or cat food bait. I know they're vermin, and my husband rolls his eyes at me, and the cats are constantly leaving mice heads in my house, but I just dont have the heart to kill them! Maybe I'll change my mind soon, but for now they're going to get released into the fields.
I also considered the suggestion of introducing cats to the henhouse, but not sure how that rodeo might pan out.... My two cats are indoor furballs with an attached outdoor dog run. Actually the chickens probably have more space than thw cats do! Lol!