I have kept my 4 ducklings outside for the last 2 weeks. They are almost fully feathered. At first I would round them up and lock them in their kennel. I have a chain link fence all around my backyard. And I have blocked all holes. So since the weather is warmer and they seemed to be fine by themselves, I didn't lock them up the last couple of days. This morning they were gone. No signs of a struggle or anything so I assume they got out on their own or someone took them. I walked around my whole fence and cannot see how they could have squeezed out. I walked around everywhere and drove around everywhere. They are nowhere in sight. I am so sad. I don't want to have to start all over again.