I am so sorry about this. Poor Gonzo! Why is it that things like this always happen to the responsible pet owners? Kay and I have had several encounters with loose dogs on the dog beach. Luckily, none have been vicious. Duke wouldn't stand a chance if something that big got a hold of him, as he's so old now. I would get copies of the vet report and nail that jerk for everything I could. It's really too bad you didn't have a camera with you at the time so you could have gotten pics then. I also feel sorry for his dog because he's obviously a horrible owner. I hope one day that you can both enjoy the park again. It's sad how one jerk can ruin it for you.