I just put a nipple waterer in the coop this afternoon. Six little ones 7 days old today.... A 2 gal bucket.. on a piece of wood to bring it up a bit. Within seconds they were pecking at it.... so I took the regular waterer out... with all it's marbles... and watched... they were ravishly pecking it... all of them... but after about an hour of that... I went over and every one of the little trays under the nipple were dry.... (mine have a little tray instead of just the naked nipple.)... but they were dry.... well pecked or not.... so I put the other waterer back and they drank for a good while... all of them... So I'm thinking that they can't peck hard enough on that little silver button to actually get the water out.... They are close.... and every once in a while one of them will get a little... I can see her.... so at 7 days... I'm gonna leave the other in there too until I'm convinced they are actually getting abundant drinks.... Hope this helps.. I'm brand new at this.... but loving my new babies.I have not used nipple waterers. But I do use the small gray square pavers to put the waterer up on. One usualy keeps it level with the pine shavings and two puts it almost perfect height for them. The reason the waterer should be at shoulder height is this exactly. I didn’t know that the first 4 times I raised chicks lol.
But try moving the pine shavings and putting a paver on the floor of your brooder and see how high it makes it. If it’s head/shoulder level, they can’t climb on it and have a harder time scratching a shavings into it.