As the title states, my 4 yr old basenji has kind of always been aggressive to other dogs, but lately it has gotten worse. For instance, she will be laying on the couch next to us, and when my other dog walks even remotely close to her, she starts to growl. She has attacked my other dog a few times and my siblings dogs a handful of times. As far as we know, she’s healthy. She had a check up a few months ago and she was fine. Just recently, she attacked my brothers shih tzu and the poor dog got so freaked out from the attack, she vomited everywhere. She’s getting worse and we’re not sure what to do. We obviously love her and want to keep her, but she’s acting out more and more and I’m not trying to have to find a dog sitter for only her when we visit my relatives. Any advice is appreciated.