Here's what I have. . . three chickens, one small tractor coop. They usually free range in the backyard. Here's what I want. . . a waterer system that won't grow funk and that's easy to fill/replace. What should I get? I don't want it to be expensive. What we have now is a gizmo I bought at Southern States that holds an upside down Ball jar. Currently the dog drinks out of it (it also grows algae like crazy despite my cleaning efforts). The chickens, on the other hand, drink out of the dog bowl. Go figure. Now what do I do? I've read lots of threads and am a little overwhelmed. Any help?