I have a much loved idiot of a dog (hound, almost 60 kg) and until recently the worst injury I'd had was a bit of shoulder soreness, mildly black eye and sore head after headbutting me.
In the last 2 days however, he's given me a concussion (dragging me into a tree when chasing a squirrel, despite being on a dogmatic halter) and then the next day a torn tricep and re-injured rotator cuff, due to pulling me after another squirrel in a strange direction.
I would definitely think twice about getting a genetically predisposed chaser again and certainly one of this size.
Please make me feel better with similar stories of woe.