So I'm doing duck duty last night in the pen around 9pm when I got home. My four were planning an escape all day, I swear. The minute I take their rubber tub out of the pen to clean it, they all quiet down for a few seconds. When I turn around to see why, they were all standing outside the pen. The minute I turn around they start chuckling up a storm like they had pulled off the great escape. So after a few circles around the pen they finally decide it's better to be inside where the clean water is. All except my dumb little Tilly. She decides to take a different route. So now three are in and one is out. She's wandering round and round the pen on the outside and the others are circling the pen on the inside. After about 10 min se finally figures out where the door is and then the big family reunion happens. It does amaze me when on get separated how flustered they all get.