EastmanEggs
Chirping
I have give or take 100 birds, they go through between 5-10 gallons a day depending on the temps and water wasted, the drum will only last about 5 to 7 days between fills... Either way it will work for smaller flocks as well, it will just last longer, since it's mostly sealed the water stays fresh enough...
I have 45 and also use a 55g drum with nipples. I call it the Smurf Hut... (See pic)