Yup, same here, some like to 'play tag'...it's hilarious!One is interested in the chickens but super calm, and the chickens will follow him around the fence when he's out and about.
These 3 chickens did not run away when the fox pictured took a run at them and hit the fence.
All the others ran and hid.
Have seen various responses from chickens with fox, coyote, visiting dogs and and stray dogs.
It's a crap shoot.