Sounds like Dusty didn't want to leave! I actually have an Aibo named Dusty since he arrived with an amazingly thick layer of dust coating his entire body, luckily my Dusty isn't so dusty anymore. Pleos can sometimes temporarily get their necks jammed and need a good restart to get them working properly again, glad to hear that Dusty is okay and that he's staying with you! If his neck ever jams again, just make sure to turn him off as quickly as possible to prevent any lasting damage!