I'm an avid DIYer and am building my first coop for our 6 hens (god, I hope they all turn out to be hens!). Coop size is 48"x48"x48", 36" off the ground. I know that I don't want a "traditional" waterer because in taking care of others birds, I've seen how messy these can be. I also know that having a dry coop is more than preferred. I'm considering building a system with 4" PVC that would be a simple "L" shape. I'd like to use a bird bath heater in the winter months to keep it from freezing. (I have a tendency to over-engineer these contraptions, but that's 1/2 the fun, right?? ) So my question is this? Which is better at keeping the birds hydrated and keeping your coop driest? Cups or Nipples (if nipples, horizontal or vertical?) (At this stage, I'm also not worried about training them. I've heard that a laser pointer is ideal for that - keeping it out of their eye, of course!) Thanks for the advice!