My main flock consisting of four laying hens, a broody with her 3 tiny chicks and a Japanese Bantam rooster has been free ranging for the last 2 months. Today, my biggest hen (weighing about 3 kg) just vanished. No feathers, no blood, no visible signs of a fight. The others, including broody and chicks were fine. What could have gotten her and carried her off in the middle of the day? What would go for the biggest chicken of the flock? Dog? Fox? Hawk? They free range in a back garden that is partially fenced and has bushes, rocks and a hollow space under a deck for cover. Or would a hen just wander off and lose her way after 2 months in the garden? If it was a predator, can I still free range the others? They love it but during the day nobody is at home, we're working, so they're basically unsupervised. If I have to lock them up for their own safety, for how long would that be?