My betta, Sally, who I've had for 2 years now, used to be tankmates with another female betta. They were fine for that time, besides some aggression from the other, but it was never to the point where they were fighting. But now, the other female betta has completely ripped the back and some of Sally's side fin off. She is trying to sit at the top of the tank, and is gulping for air, and using what little strength she has to keep herself afloat. She's now being kept in sort of an emergency bowl for a moment while my mom is buying her a tank for herself, since I'm not at home. I just wanted to know what to do, and how I can help her, since she's literally my pride and joy. I'm going to keep her in a 1 gallon for now, just so we can keep an eye on her and do better water changes. I don't want her to be suffering though, and I'm wondering if it would be better for her if she was just put to sleep . I'll update with pictures once I'm sent some. Any help is greatly appreciated.