Take a video camera and tape the fox den location. Fox parents will often kill dozens of chickens and eat none of them. However they will make kills and drop them at the den for their kits, and even leave addled prey at the den location so that the fox babies can get some experience killing injured prey.There is a colony of foxes up the street from their place - a mother and cubs, about 5 cubs. I saw them this evening.
Mother Nature is a far cry from a Walt Disney nature flick.