I have a question on how I should handle something. Pax is with me at work and one of my coworkers was petting him, and he was leaning into her seemingly affectionately, but then started growling and showing his teeth. He's known her a long time and it was really weird. I just said "hey now" and pulled him away from her and made him lie down. I inspected where she was petting to make sure he wasn't sore for some reason, but he was fine. Now, he approached her first and asked to be pet, he leaned into her while she pet, and then he started growling and showing teeth so I'm just really puzzled as to why he would be doing that, and what should I have done differently and what can I do going forward?