Our coop is nearing completion, and I'll be installing the nipple waterers soon. My chicks are only 4 weeks old (my first), but I would like to install the nipples so they work for adult hens. I have Barred Rocks, Light Brahmas, Production Reds, and Buff Orpingtons, all full size, all hens (we hope!) Having never had adult hens before, I'm asking you, the chicken experts: 1. At what height do you place your nipples? 2. How much space did you place between them? 3. How many hens to a nipple? I know these will be too tall for my girls for a while, but I'd rather give them something to step up onto to get to the nipples than adjust them later. Thanks!