NORWALK - The owner of a 1-year-old pit bull who lost its leg from being shot says his dog saved his life after someone opened fire at a wedding reception in Norwalk last week.

Dan Fitzgerald says his dog Karma was shot twice Thursday evening while chasing down a man who had just shot him and another person.

Fitzgerald says his neighbors were having a wedding reception in their backyard when a man in a hooded sweatshirt showed up and began firing into the crowd.

Fitzgerald says he's now struggling to pay his dog's $4,000 medical bill, and that the hospital has set up "The Karma Fund" to help pay for the expenses.

Investigators say the gunman got away and they are still investigating.

VIDEO: Dog loses leg in shootingWedding shooting leaves 2 people, dog wounded