I'm about to get a "big" waterer and feeder for my chickens, as they're outgrowing their little chick versions. Not to mention every night they dump them over (I think they're roosting on top of them). How big of a waterer do I need, to accommodate 9 hens in a hot climate? I don't want it too big, because I don't want to be dumping out a lot of water every morning and wasting a lot of acv. But I want it big enough to last them from one day to the next without danger of running out. I guess I could just get one that holds like 7 gallons, and then just adjust down the amount of water I put in it. What do y'all recommend?