We have some friends who have a really well-built chicken coop. Sometimes we help them with the birds when they are out of town and bring back eggs.

A while back they had a stump in front of the house with a family of foxes living in it and they pointed a game camera at it.

Night after night they got footage of the fox mama bringing back other people's chickens to feed to her kits.

The moral is, I think, that the well-built chicken coop is a good investment.