I used to keep chickens, too. They had free range of my garden so used to spread their crap all over the place—it never got too concentrated. But I can imagine that it would smell otherwise.

I’d read that pee scares foxes off. Not sure how good the evidence is, but it seems plausible. I used to tip some pee near their coop. After a while I stopped and they got attacked. Just an anecdote, but I thought I should share it!