Well Rex is at the stage it seems. He is especially jealous when I take Tink out. Today I forgot to close the closet door and he could see me at the computer desk with Tink perched on me. I kept hearing a scratching sound and looked over to see Rex glass dancing and head bobbing with full black beard. Then Tink noticed him too and started arm waving. Rex was like 20 feet away mind you, lol. So yea it seems Rex is officially a teenager now.