We just bought a 3.5 gallon nipple watering bucket. On the directions it just says, "Hanging height will vary by breed but should be high enough so that chickens must reach up slightly to drink. Recommended for Adult Birds Only!" We have 3 different breeds the longhorn is the smallest and the red one (not sure the breed since it was given to us and they didn't know) is the biggest. None of them want to come over and stretch slightly then stand there so that I can use a tape measure to see how high to put it. Yep I tried that, silly me but was desperate to get it right. Also while I was reading on here I saw that many use a nipple waterer for little chicks but this system says for adults only. Is there a special one for the little ones? I was going to get some more in a week or 2 and want to be prepared. We are new at this and appreciate all the information here. We used to search all over the internet for answers the found this site and now it's the only one we have needed. Thank you to everyone for all the help.