It may definitely be medical. But just because she hasn't acted this way before and now she is, doesn't mean that it isn't behavioral. This could have been brewing for a long time...her tolerance level could have held off this reaction up until now. That is....if you have been raising her all along with this attitude that you need to be in "control" or she'll think she is the one in charge. (this isn't how dogs work...it's an old myth and it can cause harm) If you have been raising her in a strongly compulsive way or punishing her a lot, this can bring on this kind of behavior. It may not show itself right away, but simmer until the dog finally reacts. This is not to accuse you of mistreatment of your dog, (I don't have enough information to assume that) but simply to bring it up because of some comments you've made about the fallacy of having to show a dog that you're in control. If it's done in a stern, threatening way where the dog feels defensive, it can definitely cause this kind of behavior...maybe not right away, but often it shows itself some time in the future. That's why sometimes people are surprised that "suddenly" their dog's behavior has changed. It's not actually sudden at all. Only the outward signs are sudden.
She may not have shown it before but now she simply came to the end of her tolerance. A different combination and amount of other stressors can contribute to whether a dog goes over the top or not. Maybe all along, other stressors weren't present and she was able to keep under threshold. And then lately, something else has combined to push her past her threshold.
So, barring this...if this hasn't been the case or your relationship hasn't been one where the dog has been "shown who's boss" in a threatening, punishing manner, then it could be something else. Maybe the dog has been affected very strangely by the storms and is terrified. I think you're handling it well when you associate treats with your presence. But I agree to get a behaviorist after ruling out anything medical. (thyroid imbalance, brain tumor or something else) They are expensive, but maybe one session would be enough....one where your dog is evaluated and you're given some exercises to practice.
She may not have shown it before but now she simply came to the end of her tolerance. A different combination and amount of other stressors can contribute to whether a dog goes over the top or not. Maybe all along, other stressors weren't present and she was able to keep under threshold. And then lately, something else has combined to push her past her threshold.
So, barring this...if this hasn't been the case or your relationship hasn't been one where the dog has been "shown who's boss" in a threatening, punishing manner, then it could be something else. Maybe the dog has been affected very strangely by the storms and is terrified. I think you're handling it well when you associate treats with your presence. But I agree to get a behaviorist after ruling out anything medical. (thyroid imbalance, brain tumor or something else) They are expensive, but maybe one session would be enough....one where your dog is evaluated and you're given some exercises to practice.