Staring should not result in correction!
She learnt not to lunge at another dog by being corrected...
She learnt not to pull towards another dog by being corrected...
Ok that's alright.

Unfortunately you have taught her avoidance behaviour - she is avoiding outright aggression because the alternative is a correction. She has not learnt an substitution behaviour which is why you are having issues with the staring and alert behaviour that you describe.

Consider then, that absence of a negative is a reward... ok now she has previously lunged/pulled but she began to improve - hence you 'rewarded' her for the good behaviour. You cannot continue to move the goalposts by correcting 'just' staring.
Does that make sense?

The risk is that your smart and tough dog will conclude that any behaviour around other dogs will get her a correction, so what is the point of being good? Once that clicked, corrections would have little/no effect and her aggression would get worse. It might not work like that but it'd be like playing russian roulette with the odds stacked against you.

I would take her somewhere where I could see other dogs, practice the marker work that you have learnt. Recalls on a long leash etc. A lot of focus work, get to the point that your dog will ignore a passing one without need to pull out of the way. Gradually desensitise her to the point where dogs are not a big deal. Correction is a tool in your toolbox, it should not be the first tool that you reach for and in this case seems inappropriate.

Also IMHO - if you have a dog who is very hard to correction. Avoid creating situations where corrections are warranted. The more you 'fight' with a strong dog the harder you have to fight on each occasion. I would redirect through obedience, focus, play or anything, before issuing a leave command and then if necessary a correction. This does not always work but I tend to set up my situations to allow that. Without an alternative behaviour being taught you will be stuck where you are now.

duplicate post

Thanks Guys.

It needs to be said that everything that's been said here can be applied to all other distractions that cause a dog to become agitated. So glad I found it! Lots of stuff to read and research. It never fails to surprise me that when I get on the computer I find something else to read about dogs that I never knew before. I've never heard of the BAT system!

Did you see this reactive-dog thread?

http://leerburg.com/webboard/thread.php?topic_id=32091&page=1#358492