I was wondering about something, I have a 5 gallon bucket for my 29 chickens water source. I put 1/4 cup acv in their water. They don't drink all the water up in one day. Do I change their water everyday and put fresh acv in there or how do I do this? Sounds like a waste of vinegar if you put 1/4 cup in there and they only drink half of the water during the whole day. Any suggestions?