Miranda - I agree with what several others have said, about having your insurance company or lawyer handle this. Your medical bills might be extensive, and your homeowner's or renter's insurance company will almost certainly ask for the dog owner's name and address.

As a dog owner, I know that if my dog were to run in the street in front of someone's car, I would be held responsible and liable for any damage. (Massachusetts law, I looked it up when this did happen to one of my sister-in-law's dogs.)

Especially since the owner KNEW that his dog did this, it was extremely negligent on his part not to control the mutt.

I know that this is just more bother and worry for you while you're recuperating, but something has to be done so that this dog doesn't succeed in his quest to kill the next cyclist that comes along.