I have also bought dumbo rats from pets at home, I bought the 3 males on saturday, and one of them is incredibly friendly already and runs up to the cage door, the other one approachs the cage door, but is still a bit too timid to come out, but is getting there
However the 3rd rat, is much more timid, and is much less active than the other two. He also sneezes sometimes, and stays in the tunnels and houses for longer than the other two. I am attached to him and don't want to return him, but should I be worried?