I always wait till at farthest 75-80 yard, but usually try to wait till 15-20 yards. You gotta play it by ear though. So far I've been blessed and lucky. Knock on wood after around 150 hogs with Connie Chung and my buddies pit "girl", I have yet to see Connie take any more then mild scrapes and her vest doesn't even hardly look used.
Possibly the best name I've ever heard for a dog! HAHAHA