Jazz was a rescue. She was very sick when I first got her, but after she recovered fully, she was a lot like you describe. Tango was so well behaved compared to her. I found it best to deal with her in small doses. She spent a lot of time in her crate or playpen, isolated from everyone. When she was out, my full focus was on her so I could stay constantly on top of her behavior. It was exhausting, but working with her in many short spurts, giving myself and her a frequent breaks by putting her back in her crate or playpen where she couldn't get into any mischief or interact with Tango, made it bearable. And it was, ultimately, worth it. She's very well behaved, (though continues to be way more hyper than Tango) and the biting and growling and other negative behaviors are a thing of the past.