Help! When getting the hens up this morning we didn't unlock the bottom door out into their run, I only realised this when I came to put them to bed. They were trapped in the underneath bit and they had food but NO water! When I realised they had gone all day without water I immediately got them some to drink on the perch, one hen drank lots and meant the others didn't get as much, I will make sure though in funture the door is always opened. Will they be okay having only a few sips of water in a day? Will they die or become very ill? PLEASE COULD SOMEONE HELP AS I AM VERY WORRIED!!