I love my ducklings. But hoooo are they stinkers! They are 3 weeks old. My first ever duckies. It's been pretty nice around this area except the last couple nights it got pretty cold. Right now it's only 50 degrees. When do you think it would be safe for me to start letting them stay outside in a pen more? Right now their outside time consists of following me around the yard for a little each day. Do they need heat at night when they start living outside? When can they start living outside all the time? Thanks all!