I've been thinking about getting a tank mate for my fire skink Zuko for a while. I've recently found out about a female fire skink who was rescued from a less than ideal setup and has had poor care. She should be pretty scared. Possibly less than a year old. Zuko is in a big tank and has been on his own in there for over a year (he could be up to 2 years old now). He is incredibly shy but healthy. Runs away from me rather than show any aggression. Is this a bad idea?