This morning I found a big 'ol rat wandering in my chicken run. I have not seen them around before and now I am worried. The chickens were safe in their coop (it is a raised coop, 4 ft. off of the ground, and really...I need to get another job to pay for all of the hardware cloth I've used in building it!!). I'm thinking that it must have come in from the run roof. I haven't finished that part of the project yet but will be doing so today! I'm wondering if anyone has had success using essential oils (mint) as a rat repellent? I really, really don't want them around the hens, or me!