I got a 1.3 group of mice from Petco. So far so good. They've been together for a few days. They are living in a 10g tank with a wooden "house" thing that they absolutely LOVE, and I just gave them a wheel. It was fun watching them investigate it and figure out how to use it. The male is albino, two females are black with a white stripe right before you get to their back legs, and one female is brown. I can't wait till I start seeing some big bellies!