I have had mine 2 years and HE still does that. And he was neutered when I got him. He was getting better til I added a third to the trio. If it wasn't mean, I would separate Lexie, she's the calmest sweetest quite glider and all they do is scream....They are ok in the cage (when not in the pouch) and tent time, but peak in the pouch or touch in when they are in the cage and SCREAM!