I have been having mousers change to rat eaters and some of my rats eaters change over to mice only recently. What is odd is most of my rat eaters have never had a mouse in their life. How many if you have this happen? I am not worried at all it is just comical how they decide that they don't want one food or the other in a weekly feeding cycle. I have often wondered if they get tired of eating the same thing over and over again.