I have a feeder for my layena and a flock block ( both are hanging from the celing) that I leave out all the time so my chickens always have something to eat. Lately I have been noticing that my feed has been eaten faster than normal and I found that my flock block is being hollowed out durning the night. How can I keep the mice out of my feed? My coop is an old alumanium shed that I converted so it dosent seal up very well. Does anyone have any suggestions on how I can deter them away from the coop all together?