I have a 1 yo greyhound mix named Squeek that we rescued about 4 1/2 months ago. She's an alpha female. She gets along great with dogs when she's off leash and absolutely adores our other dog, Riley. However, when she's on leash she completely loses her mind when she sees another dog (except Riley of course). Esp. if that other dog is her size or larger, regardless of whether it's male or female. She doesn't seem to mind smaller dogs as much. She loves people, including kids (turns into a wiggling and licking machine when someone walks up to her), so we're not worried about her around people. She's also very submissive to humans, just not dogs.

We're taking obedience classes with her. Riley's been through 6 sessions (each 7 weeks long and progressively more advanced), so we've got some training experience and thought that this would be pretty easy because we were working with her before the class even started.

Her first two classes were awful. The trainer didn't even think we could continue because of her behavior. She would bark, snarl and growl at any dog that came within 20' of her. The first half of class I just had to walk her around outside to calm down. She wouldn't even respond to treats or toys. The second class they brought out a gentle leader for us to try. Immediately, and I mean, seconds after putting it on, she calmed down. I was actually able to take her out onto the floor with the other dogs. We were able to finish the class session. She's now starting her second session. She's better but we still can't have dogs come within 10' of her. We try and get her attention on us when another dog comes near but if they get too close she completely shuts down to us. We turn her head towards us (gently, of course) to try and get her to snap out of it. Otherwise we try not to make a big deal about it.

We warn the class that she is dog aggressive and not to come near her, but of course some people just don't take us seriously. We usually have some sort of run in at every class. She hasn't gotten to anyone's dog because we've been so diligent about watching who's around us and not paying attention. I just want her to be fine around other dogs when she's on leash. Our trainer just says to keep bringing her in and she'll slowly get used to it. I eventually want to get her into the agility class because she's so athletic, fast, and agile. But it has a lot of off leash work and the instructors won't lets us take it if they don't think our dog is trustworthy. Anyone have any input or advice to help her get past this?