Indeed. My bf, who is a top-rate "fixer" of pretty much anything and everything, would get that chore, and I know he'd be 110% certain that we were in a no-leak condition before putting it into service.
I thought about that "inside" temp too with all those birds in there along with the hay bales, but I like the idea and might modify it using a larger salt-water bottle.
Then again, we have an outdoor, automatic watering system that runs off an underground supply line from our house. On nights...