So after getting my rat, Amity, I joined a few groups and everyone told me I need to get her a companion. Well, I had the chance tonight and I did. I've read a bit up on introducing rats in a mutual area, I was thinking maybe in the bathtub. How long should I wait to introduce them? I have two cages so it isn't a big deal if I have to wait a while.
Another question, or a concern, is that when I bought the second rat, I didn't notice how much smaller she is compared to Amity. She is younger and will get bigger but I do not know if that would be a hazard to introduce a smaller rat to a bigger one.