Hello all. I have been reading the forum for a while now but have never posted. I am new to ducks, but in short, I have five ducks. Two pekins and three rouens. One drake in each. They are now about 9 months old and live in a hardware cloth pen, which is 8' by 10' and 6' tall, and it gets moves around every few weeks. They have a baby pool and a dog house inside the pen. I have plenty of land, and there is a one-acre pond down the hill, and I would like to free range them during the day. However, it would take all of about a day for the local vermin to figure out they were around if I leave them out over night. As a result, they need to be penned up at night. They are totally skittish, save one of my rouen girls, who is just a sweetie. We have been feeding them at the same time each day and ringing a bell. We plan to ring the bell to alert them that it is feeding time in the pen, but any other suggestions for getting them to pen up at night?