Since you say "now" he's like that, he didn't mind it before? Do you think maybe something set him off where he feels he needs to protect his territory? If he's treat driven, how about giving him a treat when someone passes the window? For those that come into your home, hand them a treat to give to Rocky.
Zoey's somewhat like your Rocky. Except she doesn't bite/nip at humans no matter how wound up she gets now. There was one time where her teeth ripped through my shirt and cut about an inch of my skin on my side. I screamed bloody murder. She didn't mean to hurt me but she got extremely wound up that she just grabs (with her teeth) whatever is closest to her. Which happened to be me at the time. |