They are the smartest and most trained of my rats. They know there names and come when called even when out of the cage. They seem to love me and my husband but are in sure of strangers. I found out they come to there name out of the cage because my friend was holding them and they both jumped off her at the same time (as if they planned it) I said there names and put my hand down and they came straight to me. They got some treats for coming to me.