[hokisteph5]

I'm not familiar with agility classes/seminars/trials/shows, but what did the instructors do or say to this woman? Nothing? Is there any way you can talk to the instructors and share your concerns about this other dog owner?

If they're not going to do anything, and you decide to go back, I would make it a point to not allow this woman or dog to get away with bad behavior. The next time, if there is one, the woman's dog heads for yours I would very loudly and clearly say something like "please get your dog under control."

I was in a class last spring with Gretchen and another dog owner had a Dutch Shepherd. She could hear her dog do a low growl when Gretchen and I rounded the corner to class, but I never heard anything. She just asked me to keep Gretchen away because her dog didn't like mine.