First-- it takes DAYS to slowwwwwly and g-e-n-t-l-y acclimate a dog to a Halti or GL. You can still use the GL, but, introduce it slowwwly. On for 1 minute while she licks yogurt or honey from your fingers, then off. On for 3 seconds later in the day for more yogurt or honey licking. Next day, same thing, and at dinner, GL on during mealtime, (you add a totally yummy blob of yogurt to her meal.. cool surprise, Mom!) then off. Next day, on for 5 mins for mealtime in morning, and at dinner. Supervise her. Slip the GL on her another time, and go for a walk in the yard-- but clip the lead to the collar, not the GL. Gradually, use the GL for 5 mins in the yard while heeling. No distractions, nothing to pull towards.
Next, you will need to practice the "Watch!" command in your nice, calm, boring, non-distraction livingroom. Remember, the Watch command has a beginning "Watch!" a middle, (when she is looking at you and hearing a soothing, calming "goooood girrrrl" and and end: "Okay!" (her release command from that command.. can be 'free' or whatever you use). Next, the same excersises done in your backyard. Then at a place in your neighborhood, where there will be some activity, but not another dog present.
Now it is finally time to get that Watch command around other dogs, but only when they are WAY outside her flip-out zone. If she can remain semi-calm when a dog is on the far distant horizon, for example, well.. then start there! Say "Sweetie, WATCH!" "goooood girrrrrl............. Okay!" and click and give her her treat.
Next, put the girl to work! LOL yup... how can she remember to freak out about another dog when, gosh-- she had better watch you, because you need her to hurry and HEEL! Whee, a click and a treat for that heel.. then, a sit! A click and treat for that sit! A down? Wow.. that was sudden-- she had sure better watch you, because she never knows when you might ask her for a new.. whoops!! There's a heel again.. but you are doing a zippy figure 8! Then a zig to the left and a zag to the right.. darn, she'd BETTER watch you, or else how does she get to participate in this dancing-for-treats thing? Too cool!
Then, in time, you get a little closet to other dogs, and begin Watch! Sit! Come! Heel! (figure 8 with her, do a left circle so she hasta watch out cos you are coming fast into HER space, etc.. whoa.. treats! dancing with mom! cooool!)
The GL is great for stopping the leash reactivity. What happened to you was pushing her too fast with using the GL and pushing her too fast with proximity with other dogs. You can do this! I have had HUUUGE improvements using this method!
Best part is the day she will see another dog, and automaticly give you focus: "Where's my cookie, Ma??" Then you treat her like crazy... jackpot for an Autowatch! I love Feisty Fido stuff!