I was noticing how wet the bedding was in the barn. Are you sure the waterer was not just leaking out? Those that seal at top can be tricky....
I prefer the plastic kind that you remove base and turn over to fill. Slide the base back on and flip it upright. They rarely leak....
I was thinking that my waterer could be leaking. I had checked on how it was sitting, and although the coop isn't perfectly level, the water was leaning more towards the corner than towards the center of the coop. I think I'll look for another type. I could use this one for the outside run only.