My chickens HATE red! If I put a tomato in the run, they go spastic and are petrified. One day, I forgot about this odd behavior and put their food in a Folger's plastic coffee container...it was red!! I didn't realize until the afternoon, that they had been avoiding going anywhere near that container all day! (No worries...they always have two separate food sources available). When I picked it up to remove it from the run, they all started flapping around and carrying on, running/hiding, etc. It is just so strange.