This day started with light rain. Mu and I searched for a cat in North Seattle. I think the cat’s owner had asked how close Mu had to be in order to detect a cat. I probably gave my typical answer, that he has detected a cat from 100 feet away when the wind was blowing the right way, but he could miss a cat that was three feet away if the air flow carried the scent away from Mu. Shortly after that, Mu walked by a cat that was sitting on top of the fence. He didn’t catch the scent until he got to the end of the fence. Then you could see his head come up as he followed the scent plume around the fence and his nose went up toward the top of the fence. It was a perfect illustration of how air flow affects the scent dog’s work.