If a fox has been visiting, then it might be that you happen to be on his "route" and he has popped a bit closer to have a look.
Foxes do have routes throughout their territories linking their "earths" and also their favourite hunting routes. They dont like anything different on these routes this will make them suspicious as they are extremely cautious (rural are more cautious than urban foxes -however, a hungry fox or vixen can be quite emboldened)
So you could change things around move stuff around( I know someone who used to put old boiler suits out in different places) add your scent (if you get my drift!)
Saying that that if Raynaud has been visiting a nd your chooks are OK thats a positive, and a few detterents around will just reinforce that.
Also, have a look around for his droppings -looks like dark, oily cat poo!!
Hope this helps -just based on what I have around here which are the rural foxes.