I live in the UK, in an urban terraced street where all of the back gardens are next to each other with fairly low walls.
Recently what I believe to be an urban fox has started using our lawn as its own personal toilet (it's not a cat - the faeces are definitely non-feline). I've purchased some of the scented granules that are meant to prevent animals from visiting but they do nothing.
It's getting to the point where my lawn now has many bald patches as removing the very unpleasant piles involves yanking out a handful of grass to get rid of it all - and then the bare earth encourages cats to come and use it as their toilet.
Are there any preventative methods that actually work?