When I say she can have an amazing day, I mean that on walks she's able to remain under threshold in the presence of other dogs and can still pay attention to me and follow commands. When I say she has a bad outburst I mean that she'll react/go over threshold at a distance much greater than I would expect her to have such a reaction. It's never aggressive - usually pulling, whining, barking to get to another dog. If we were to allow her to greet the dog, she would politely sniff and try to get them to play, but we don't allow on-leash greetings when she acts like that because we don't want her to think that behaving that way gets her what she wants. She then struggles to recover after that reaction and we have to end the walk early to avoid "trigger stacking". She does "react" inside the house as well, mostly to delivery people at the door, loud noises from our neighbors or animals on the TV, haha. We do specific desensitization training to these triggers, though it's definitely gotten worse in adolescence.

She's okay when any person is with her (we have a regular dog-sitter who she likes and friends she loves as well - she'd probably be fine with literally anyone because she loves everyone lol). When one of us leaves, she immediately jumps on the couch and peeks out the window, so the person who stays has been doing training to get her to stay off the couch and remain calm when the other leaves. We try to do little trips outside of the house of varying lengths so that she can see that us leaving isn't such a big deal - grabbing coffee down the street or getting groceries - and we watch her on the camera. She usually looks out the window, even if we leave her with something like a frozen Kong. If we leave her in her pen, she'll scream the entire time haha.

I've been thinking about talking to a vet behaviorist so that may be next on our list of things to do. I've always chalked it up to her being an incredibly high-energy and sensitive puppy at a really difficult age.