Grimm has suddenly decided that he is cock of the walk. He's medium sized, and can really be in either the big or small side at daycare, so I've been rotating him away from whatever side I work on so he can improve his skills with my coworkers. In general, he's a love ***** who gets along well with everyone. A little shy at first still, but he does come up to them without coaxing, expecially if they have food. There is a dutch door, that seperates the small dog hallway from the yart. The top is usually open, so the staff can hear the intercom. Grimm has taken to puting his front paws on the door and barking like a fool at whoever enters the hallway. It's loud, and scary sounding, though I don't think he means any harm. If the person (always a staff member, customers are not allowed in that area) actually comes out into the yard, or even reaches out to pet him, he's fine and allows them to touch, no problems. Issue two: He's also started talking back to my coworkers. He was attempting to dig a hole yesterday, and a coworker called his name loudly to distract him. He turned around and ran up the deck at top speed, away from her, then barked twice from the top. His tail was wagging at the time, and he seemed to think it was a game. Then he came laid down and went to sleep. When she came up, he was fine with her again. Are either one of these things something to worry about? I don't want him to become aggressive at a barrier. It's almost like he's doing some teenage testing, but he is almost two years old. Could it be because he was shelter raised, and I am the first home he has ever had, that he is going through the teenager stage late? He is still a foster, so I need to be very alert for red flags in his behavior.