I have been feeding my ducks/hens tap water. This means we walk out to the back lot get the waterers bring them back to the house and wash and refill them and then return them to the hens/ducks. My DS decided this took too much time. He started to fill the waterers with the secondary water (irrigation water). It is not safe for humans to drink and yet see many people feed their dogs, cats, critters with it. Do you suppose it is safe??? Or should I inform my DS (who volunteers to take care of the critters) that house water is the only water. My other thought was that the ducks drink water from the pond...the same pond that is full of duck yuck, fish yuck, and who knows what else yuck. My guess is the irrigation water would be an improvement. Just a thought.