The girls seem to be getting used to many changes. They seem to have taken to the bottle nipples quite well. For now have a small water bottle in coop with the ten gallon double nipple "cooler" in the enclosed run. Wondering if anyone has a formula for changing it? 10 gallons may have been a bit much but if you don't have to worry about water going bad... I do have a bit of cider vinegar in it now. Any comments would be welcome!