Umbrian, thanks for your understanding message. My fight with the boar goes on. At least now it is only fence posts which they are excavating, not the foundations of the house any more. Next I think I'll try an electric fence to protect the original fence posts!
I was astonished to hear that your porcupines are digging up Iris unguicularis. Following a posting from Fleur recently I have used an axe to divide some clumps.
Re. the deer. I had tried planting bits of Rosa canina collected from the field and a couple of bought Rosa rugosa. I protected them to about 80 cms height, and the deer ate as much as they could reach.