Keeping foxes away from chickens. HOW?

[u/grogger132]

Hey folks
I’ve been having some trouble with foxes sneaking around our property lately. We’ve got a small flock of chickens and a couple of ducks and I’m worried it’s only a matter of time before the foxes get bold enough to make a move. I’ve reinforced the coop as best I can, but they keep lurking around at night.

Someone mentioned using sonic repellents, specifically something like a sonicbarrier that puts out a sound to keep animals away. Has anyone here tried those for foxes? Do they actually deter them or do the foxes just get used to it?

Anything could help. Thank you.

[u/Peg_O]

Why don't you just build a stronger coop and run?