ABC has renewed “Wild West C.O.W.-Boys of Moo Mesa” for next season, but the King World-distributed Saturday morning series will shift production companies from Gunther/Wahl Prods. to Ruby-Spears.A spokesman for Gunther/Wahl confirmed the split and said it was “due to creative differences in the direction the series was to take.” The relatively new animation supplier, a partnership of Lee Gunther and Michael Wahl, said it still has a number of series in the works. ABC also picked up another first-year series, “The Addams Family,” for next season and committed to a show from Children’s Television Workshop, “The Way Things Work,” designed to meet its stations’ educational requirements under the Children’s Television Act. The network has a void to fill in the children’s area because three shows from Walt Disney TV Animation –”The Adventures of Winnie the Pooh,”"Darkwing Duck” and “Goof Troop”– won’t be back next season (Daily Variety, Feb. 17). The network is also in the middle of a three-year deal with Warner Bros. on the hour “Bugs Bunny/Tweety” show, its top-rated Saturday morning program.