Mice issue...

[Chicken Heel]

My best mice/rat deterrents are Tom, Esmeralda, Kit, Kat, Smooter and Pooter. They have also cleaned up the property of moles and voles.

 

[deidreg]

Sounds like you've secured the coop very well. I've done the same, plus I have hardware cloth under the coop and run. It's covered in deep mulch. No issues so far, though I'm new to chickens this year.