Cow and Chicken

Me An' My Dog (3x9)

Air date: Sep 12, 1998

Cow brings home an ""invisible"" dog, whom she dubs, Kevin. Pretty soon, she and Kevin are inseperable, but causes trouble with school and friends. After she enters Kevin in a dog show, and wins, Kevin ""runs away"". Afterwards, Cow finds Kevin, befriended an ""invisible"" homeless man.