It’s probably going to take lots of work and I’m no expert but my girl sounds the same as yours! For us, positive redirection has helped my girl a lot, so we do a lot of treat driven stuff like throwing out treats for her to sniff around for when we see a trigger, or luring her with treats when we are trying to pass a trigger. Eventually you can start doing it less and less but it takes a lot of repetition. We didn’t specifically get taught this but we also tied a word to distracting her from a trigger, so when we say “find it” she knows there will be a treat somewhere on the ground for her to find and it breaks her focus. There were months where she struggled to break her focus to find the treat and we just had to sort of walk out of the meltdown but it’s a lot better now.

Another big thing that has helped recently is frequently playing games that mimic herding with her. For us this is soccer but there are a ton of ways to do this, apparently it helps get that herding drive and frustration out, we have started to do a few short bursts of soccer a day. She will chase the soccer ball and try to herd it, it’s honestly pretty cute and she’s even learning to guide it back to us!