Ive only had a hedgehog once. I nearly stepped on it because it was right by my kitchen door one dark night when I went to throw some scraps for the foxes. It was quite a small one (about 5 inches) so I assume it was a youngster. I left some scraps and a saucer of water by the step and next day the scraps were gone but the hedgehog never returned to the best of my knowledge. Perhaps it was frightened of the foxes and cats. Or maybe it had strayed in from another garden where its parents used to visit.
There is a business park behind my house with an iron fence and thick undergrowth separating it from the houses. Sometimes I hear the most hellish noises coming from out back late at night - sounds like someone being murdered. Whether cats or foxes I have no idea.
Perhaps even zombies!
I am not going around there to find out.