Can you not do an auto waterer? I got VERY tired of filling my 4 gallon for 15 birds and cleaning it when it started to get green. I bought one of those that is a red bowl with a spring loaded gadget that actuates on weight from the water. Works like a charm. It's super easy to take on and off (usually do this once a day since there is lots of muck they have on their beaks when they drink that falls into it). I had to run a water line but the 1 hour of effort and about $50 worth of parts (pipe and actual waterer) was well spent. I used my edger to cut a trench to lay the water line in but you may have to go deeper depending on your freeze line.