I have a question, I have 11 WH ducks that are 12 weeks. I would like to free range them but I'm not sure how to start doing it? Can somebody tell me the best way to start and how do you get them in at night? Right now I have them in a coop in my garage. In the morning I let them out, I shake a plastic container with some food in it and tell them it's time to go swimming. It takes me a little bit to get them in their pen that we built them, it has a pool in it. I would like to let them swim in my pond but I not sure if I'll get them out of it at night and get them to go back in to their coop. Please help