Breathing heavy does not fit the tread.........Lol...I'm kidding sort of.........I was joking, when we were out late at night, we were not drinking water, but rather an alcoholic beverage.
Mine does not have water in the coop, I have at times tried it, and wound up with a mess. I do have a shelter in the run, and during inclement weather, I will put it there.
If you can provide open water everyday, it is probably an advantage. I cannot, and really see no loss. They do get liquid water each morning, and many will be taking a pretty good drink at that time. However, in really cold weather, that freezes up quick. Lucky for me, while we will get a could of very cold weather, it generally only last a few days and then gets nicer.