A couple of years ago voles tunneled into the guinea coop. I decided to wait until the spring thaw to deal with them. When I looked for them in the spring, they were all gone because the guineas ate them. This summer a field mouse made it into the coop for a couple of days. I found its half eaten body in the middle of the second day.I hope my light brahmas become great mousers when they're all grown up because as it is now, ALL of my birds will watch a mouse or chipmunk just still up to the food dish, grab a meal and walk away.....