I have a hose strung up to my layer coop, and the water that sits in the hose, especially on hot days, smells terrible. It's also makes the water foam a bit when you spray it into the container, so I figure there must be chemicals leaching out from the hose. We always run the old water out first. Hubs is toying with the idea of putting a spigot by the coop, but we would run pvc pipe for that. Rarely freezes here either. Make sure whatever system you use can be cleaned easily. Some of the fountains I've seem fill up with muck and algae. You'll do great! Take a deep breath! Think positive! Good luck!