Today one of #2's gerbils passed away. Her name was Toast and she was the cutest reddish tan color. That leaves his other gerbil all alone. She's an older gerbil, so I'm not sure she would do well if we introduced a new gerbil at this point. I know gerbils are social by nature, so now I'm worried she will soon follow Toast due to being all alone. No point in getting a baby gerbil companion that will outlive her and set us up for this situation again. :(. RIP Toast.