We don't have any dog parks in my area, but they are trying to open a couple. I have wacthed that show on caple that is about dogs and thier people in New York. I think it's called Dog Park. They always meet w/dogs at a unleashed dog park and it looks scary to me. I would be scared to death my boy would just even be stepped on let alone anything else! Also, I would def. be scared of deseases, because you just don't know how responsible the next person is. Parvo in a chi,chi would be fatel! I just wouldn't risk it!