Darn things. If they're not waking us all up with their noisy mating rituals, they are pooing in our garden. Never used to bother me that much, but DD is old enough to play in the garden this year, so I'm worried about the risk of toxocariasis
What's the best way to deter them? Not those things that emit a high-pitched noise. Several of our neighbours have them and not only is the sound still audible, but I've seen foxes nonchalantly sitting right next to one. In broad daylight.
I think part of the problem is that our garden backs onto the communal garden of flats, the corner of which is rather overgrown. I think that is where the den is.