My approx 4 y/o rescue dog which I've had ~6 mos seems to be reactive to collies. I say "seems" because as we pass and/or greet all kinds of dogs on our daily walks, there's a man w/a collie that just drives him crazy. We're on opposite sides of the street and my dog will bark and lunge. I didn't know if it was the man or the dog (or combo) that was making him react, but at a recent training class, the instructor had a collie and our "walk past another dog" test did not go well with my guy. I'm interested in a beginner's rally class at another facility that would be starting soon. I haven't contacted them yet, but when reading up on the instructor for the class I see she owns 3 collies. I'm disappointed/embarrassed that my dog reacts this way. He's a good guy in most ways, even does some therapy visits, but apparently has a bone to pick w/collies. My current instructor said not to get too upset about it - that some great dogs have similar problems. Is this true? As soon as I read the rally trainer has collies, I thought, heck, now I can't attend her class. Advice? Reassurance? Tips? Thx.