Yeah, it's not the dog's fault and I have a real aversion to being bitten. Twice now I've been told that "snookums" doesn't normally bite. I got bitten once on my bike and came off a cropper. I positively loathe tetnus etc., injections. These days when I get bitten I call the cops and have the dog put down, then I send an account around to the former owners for the cost of the medical bills.
Once I had a dog run out in front of the car and I sent them the panel beating bill. That even made it on air. The owners couldn't beleive I'd ask them to pay for the damage after I'd killed their dog.
Sorry, but if you're a dog owner you have a legal responsibility to look after that dog. If it gets its teeth kicked in, then the owner is responsible not the kicker. I feel sorry for the dog but mainly because the dog's owner is an irresponsible jackass that should never have been allowed to own one in the first place.