According to Wikipedia, they have stinging hairs, which apparently deliver an acid cocktail which irritates the skin. In my experience, which I did not enjoy, I was rashy for awhile, and rubbing certainly didn't help. It wasn't too bad, though; I knew a girl who actually took scars from nettles.

Jezzie's nose seems fine, but, well, she's a wolf. Dogs are tougher in so many ways. It cracks me up to see Coba chewing on poison oak, which seems like his favorite plant to chew on.