
Hi, you're certainly doing the right thing (is it an APDT class?) because this isn't something they "grow out of". What is your reaction to her when she is noisy and stressed with other dogs? The best thing to do is
not tighten the lead, and completely ignore her (as much as you can!)
Don't scold her,
don't "reassure" her. She will consider both of these reactions as praise and encouragement for what she's doing. So stand still, relax your arm on the lead (let it looser if possible, but don't let it go!) and pretend she isn't there. The
instant she stops, and ideally turns to look at you, say "good girl", get her to sit, then praise her.
Good luck with the classes.
:)