Well, there is no improving on Mike's answer.
I'm sure Ginger was perfectly content when it was just her. (Well, just her, Kirby and Fun Kitty
). There were some issues to work out when Bernie joined our family, and yes, Ginger has changed. She has become more independent and rarely bugs me to play anymore. (Why play with mom when she's got a nutty brother to play with?). I wouldn't change my decision for anything.
Good luck deciding what to do!