If you fill it only until the trough is filled, their still going to drink it fast! I had a one gallon waterer in with my 25 quail and they went through that in two to three days! Yesterday my neighbor, well its a greenhouse and farmers market, gave me an old two gallon metal waterer and a mason jar feeder and waterer. They just tore down an old shed and he thought that I had chickens so he gave it to me. I just put the two gallon waterer in last night so Ill have to see how long it lasts! Cody!!