Suggestions for (reactive?) Wolf-Dog Training?

edit: I've been told several times that reactive would not be an appropriate term to use, since these behaviors are all typical of a wolfdog! My bad about that! If I could change the title I would, but I figured I'd clarify here.

I will also clarify that Daisy is more than likely a very low percentage wolfdog. She displays wolfy behaviors, and has a wolfy countenance (to me at least), but she is the size of an average German Shepherd. She is very well behaved, and no one in the home is afraid of her in any way, she even loves my nieces and nephews (who are 6 & 10), following them around and letting them love on her. She is appropriately submissive to human authority, it's just other dogs she has problems with. She is a good girl! And I'm not looking to subdue or change her nature, just reduce the amount of stress on her and the other dogs while cohabitating at night in the winter.

edit2: added a dog tax so everyone can see the sweet baby. https://imgur.com/xZxNaSw

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First time here, so sorry if I'm asking something repetitive, I didn't see anything on a brief search. And sorry this is long, I'm trying to add as much behavioral context as possible.

edit: all of the dogs in question are spayed/neutered with up to date vet appointments/shots. Daisy is about 4-5 years old. Bruce and Ivy are nearing 1 year.

My mom has a wolfdog/german shepard rescue she's been taking care of for about two years (Daisy) who was taken from a home that did not have the space or resources to take care of her properly (I suspect there might have been neglect involved but I'm not sure). I don't know her %, we were just told she was a hybrid. She does display some behaviors that are reminiscent of wolf-dogs, so I believe she must have some but I am waiting for a DNA test to come back to confirm. Daisy is a very nervous dog around strangers and men (she barks and avoids, keeping her distance. She seems to be too skittish to get close enough to nip or bite) but once she is introduced and realizes you are friend and not foe, she is incredibly loving and desperate for cuddles, no matter the gender.

She has good recall, and is relatively obedient, though she will try to be sneaky when she wants to cuddle with you instead of going into her crate, going to the couch and looking at you like "This is what you meant right?"

Her only issue seems to stem from other dogs.

My two dogs, Ivy and Bruce, have been around Daisy since they themselves were rescued as puppies (adopted last year). Ivy is a more submissive and anxious dog, and has always deferred to Daisy, but Bruce is more strong willed and doesn't like to be bullied and will stand his ground. Daisy's new problem is that any time another of our dogs gets near her, she pounces on them. She doesn't bite, so I wouldn't count it as an attack, she just wants to put them on the ground and she shows her teeth with a growl. This doesn't seem to be a "you are invading my personal space" nearness, it's within 3 or four feet, or within her line of sight, she will warn with a growl, but before the other dog has time to heed the warning, she pounces.

When my two dogs were puppies running around, Daisy mostly avoided them, or warned them with a growl, and they would avoid her, and she them, unless they were playing and she wanted to join. Now that they are nearing a year old, the behavior has escalated to the pouncing, which I want to nip in the bud.

I have tried to discourage her from this with redirection, altering her attention onto me when she begins to react (I prefer firm, but positive reinforcement with treats) telling her to "leave them" or "no". I've also tried "claiming" the other dogs as "mine" and that seemed to work briefly and she will behave while I'm standing there, but if I take my attention off of her she will continue the behavior. And if I am sitting down, she will attempt to "guard" me or anyone else she's sitting with, with the same behavior, trying to pounce if any of the other dogs try to get close.

Ivy gives Daisy a lot of respectful distance and immediately rolls over if Daisy moves in her direction, and the two of them can share a couch with only some talkative complaining from Daisy for a minute before she calms down.

Bruce on the other hand, enjoys Daisy when they're playing, but hates when Daisy attempts to "correct" him, or whatever she's trying to do. If they're inside together and she growls at him, he will growl back and stand his ground. This has resulted in several tiffs between them, growling, barking, snapping. The only time it's gotten into a brawl is when Daisy "pounces" and attempts to bowl Bruce over onto his back and Bruce (who is 3x smaller than her) resists. They haven't hurt each other yet, but I have been nipped twice now trying to break them up (getting in the way of bites meant for each other, not them actively turning to me, and I know you're not supposed to get between two dogs brawling, but I don't want them hurting each other.) and I know every instance is a chance where something bad can happen.

If I can manage to redirect Daisy in the growling at each other stage, Bruce backs off and goes about his business like she's not there, but I can't seem to get Daisy to stop.

Has anyone experienced behavior like this with wolf dogs or any other dogs? Any suggestions on what I can do to amend this behavior? E-collar (i really am not a fan of this idea, it feels like it would scare and confuse her more than anything)? Anxiety meds (Is it anxiety related??). Anything I can do for Bruce or Daisy would be immensely helpful. My boyfriend and I are currently working on training with Bruce and Ivy on better leash control and walking commands, but I'd like to work with Daisy more too. Forcing them to stay separated (one outside, one indoors) all the time seems defeatist, and doesn't solve the core issue and if I can solve this problem before I move out and help my mom with her dog, I would love to do that. Basic obedience training and leash training, I have experience with, but behavioral issues outside of food aggression is out of my wheelhouse.

I should note that I live very remotely, and I don't think there are any trainers within 50+ miles in my area.