Iams 2002

There was a very happy little song used in a 2002 Iams dog food commercial that had no singing and featured only an acoustic guitar and harmonica. It was often played on TV and I even remember seeing the spot on the monitors at Wal-Mart. Any help would be appreciated. I checked searches but nothing seems to match and my apologies if I overlooked something and it was already discussed.

Great site by the way!