DOLBY AND THE WOOF-OFF

First-grader Bo Dibbs expects fame and fortune when he enters the family dog in the ``Woofies Dog Food'' contest. Dolby, as Bo explains to his class, is a natural winner: he's exceptionally intelligent and has a great woof. Emulating his determined older brother (see Oliver Dibbs to the Rescue!, 1985, etc.), Bo spends weeks training the huge, good-natured Dolby, whose talent reaches troublesome new heights when he learns to answer the telephone. The result is light, episodic fare with minimal characterization, somewhat stereotypical views on older sisters, and a nicely unexpected conclusion. (Fiction. 7-9)