For the past week or so, Theo (aka Podge) has been very hyperactive and constantly demanding attention. If we walk past his cage he's often climbing or nibbling the bars and if we open the door he'll often flop out onto our hands.
This started shortly after we got Hank and Peggy. It's unlikely to be jealousy, it's more likely to be that he can smell girl hamster and it's making him all excited.