Well, i was asking myself a question, what do i plant as a hugel hedge, to keep my neighbor in his plot of land?
I was thinking blackberries, but, i'm affraid it might invade his space too much. Same goes for raspberries. I'd like something with pointy bits, adapted to the mountains. The ground is an ancient river bed or glacier lake's bottom. Not the best ground you can have. Plenty of stones.
Or something which will contain his chickens and dogs somewhat. And produce fruits. Not too tall as well.
The hugel mound itself, if built a meter or more up, makes a very noticeable barrier. It probably won't do much to keep his animals out. That said, dogs are known to go through brambles and thickets which would turn most of us away. If his dog wants to motor on through, then the dog will go through raspberries. However, a well managed berry patch next to a close planting of roses might be thorny enough to turn the hound away on a majority of occasions.
I second hawthorn. Also berberis: can be very prickly, and can have very nice berries (mine is both); and gorse (ulex) is another prickly one, and a nitrogen fixer. Rugosa rose also has a lovely scented flower, and fat juicy hips.
if you like roses:
rosa canina, rosa rugosa, and rosa villosa all have nice edible hips. There are also some cultured varieties like "Vitaminrose PiRo 3" or "Apothekerrose" you could use for the purpose.