It is the wind that makes me procrastinate ... The worst ones for the open top bowls are the Silkies who get their poofy heads in the water, then they get ice balls on their heads that dangle in their eyes, or they just get filthy from water and pecking around. I would like to get them taped soon ...
I have a mixed flock in an unheated coop as well, and just trimmed the silkies' feathers around their face because of that same issue. They kind of looked around cautiously for a few minutes like, Has all this been here behind my face feathers the whole time? LOL. But it seems like they are staying much dryer now.
My son also made a simple baffle to prevent the chooks from perching then pooping in the open bowl we use in winter. He drilled a hole in the center of a 5-gallon bucket lid, then strung a rope knotted at the bottom end through the hole & hung the whole thing up. The open waterer goes right underneath (he left room for them to drink comfortably) and now my water dish stays clean.

0 out of 6 today. 

e The flock and me loved it.