Helloworld
Songster
I have 2 silkie bantams. They don't drink much at all. I have a one quart waterer and that lasts them for weeks (although I will be cleaning and refilling it weekly now). At first this concerned me, as I read chickens drink much more than that. But they seem fine, and I figured it's because they are so much smaller than standard breeds. I am a first time chicken mama so I'm learning as I go.
Weekly is too long and they may not be drinking because your bottom may be too small. They may not be drinking because water absorbs plastic/metal from waterer after sitting that long and the water goes stagnant. That small, I would be using a bottle brush and cleaning it everyday. Trust me, chickens are stubborn and will look at you and die if they want to lol. They may be getting sips but watch when you start changing water daily.