A Good DogBy: Jon Katz When Jon took on a troublesome two year old Border Collie in A Dog Year, it turned his sedate life upside down and culminated in a move from suburbia to a rural farm. But the contrary Collie incredibly loyal but incredibly misbehaved never settles down. Jon tries everything, obedience training, changing his name from Devon to Orson, even acupuncture, and it all helps a little, but not enough. Together Jon and Orson chase sheep across high