What do I wish I had known? Gosh, soooo much, BYC taught me everything. I guess I made a lot of mistakes, and learned from them. I guess I would say be more cautious than you think you need to be with chicks (marbles in their water dish, etc) and let them have supervised playtime in the grass even when very young. They are so fun to watch. Oh, and give them the best nutrition you possibly can! Good nutrition shows in the plumage and health of your girls.
I have a single Dominique, named "Doctor". We love her, she is one of my favorites. She has a "trick" she taught herself of walking up behind me and pecking me gently on the pants leg in a certain persistant way....she is asking to be picked up! She wants to be hugged often and I am happy to do it since doms seem to have lovely soft feathers.