Would it put you off

Skiddaw1

Hedgepig poo is weirdly sticky. Like partially melted liquorish . Dear little souls, we do love to see them scurrying around. I love the snuffly noise they make too.

youth_leader

I think I would wonder if they'd be after 'neighbourly' looking after the hedgehogs/chickens if they went on holiday. 

I looked after my neighbours chickens and ducks in the snows of Christmas 2010, nearly killed me.  I was up at 6 am to feed and let them out, putting a boiled kettle on the iced up pond to make a hole for the ducks, constantly cleaning them out.  4 pm ish chasing them all back to bed at night and always double checking the fences for holes after I found fox poo.  Then I had to net the pond because a heron had found it contained fish. Couldn't believe it when they asked me again the following Christmas, was a big noooooo.

Vegastare

The OP mentions narrow enough for a wheelie bin and a meter between sheds and house, sheds so close to a property would be a no for me.  If they are along garden boundary cant see any problem - but it sounds like actual property.
Plus if they have a lot of land why have they stuck them up against next door like that.
Next door but one had a few chickens and could here sometimes but not enough to say it bothers me.