For the past week or so, my girls have been going through more than twice as much food during the day. In the morning, I let them out to free range and the coop stays open, so I thought maybe they were sharing with another critter (chipmunk maybe?). I tested that out the other day by not letting them out and they still went through as much. I suppose something little could still be sneaking in...but I don't see any signs of that. We've had some extreme weather lately, so maybe that's it?