What the heck is going on with Wolfie? He seems to have returned to his landshark phase! His new game is to run by me at night while I am watching tv and bite my arm on the way. Then run back and do the same, and so on and so on. I correct the behavior, but he keeps doing it. I know he wasn't getting enough exercise. I was sick in bed all last week with the stomach flu, so Wolfie missed out on walks and could only go out and run in the yard. Yesterday I took him for a 5 mile hike, he played outside, and we did some of our mental games, like hide and seek, etc. He was good and tired and yet at around 9 pm the run by biting started once again. He just turned 10 months old. Is this something a 10 month old does?