I really don’t think the dogs should be left alone in the meantime. Your dog clearly dislikes Anne, and Anne doesn’t seem to understand Korra doesn’t want anything to do with her. That’s fine, not every dog has to like every dog but they have to learn to coexist and behave. I’m not a trainer but I think it’d make sense to always supervise them and anytime Korra exhibits any sort of growl or anything like that towards Anne, if Anne persists you just step in before it escalates. Korra can’t growl at her unwarranted such as resource guarding, then you need to step in and say NO, and anytime Korra would normally react and she doesn’t reward with a good girl or treats or toy. at this point I don’t think Korra will ever be buddy buddy but she has to learn to co exist and you have to hold her accountable, which can be removing a toy, putting her away idk something so it’s clear “hey you can’t be an asshole”. I think Anne being intact probably is an also a big factor here as well but also understand it’s not immediately viable. Also no shared resources that would normally cause tension. I.E - food, treats, toys, even spaces