Official title in indicia is "Rusty Riley, a Boy, a Horse, and a Dog".
Cover artist identification from Sam Savitt index by Leo Pando in Illustration Magazine #4 (2002).
Appears to be first story of the newspaper strip. Story starts on inside front cover (black and white) continues on inside back cover (black and white) and concludes on back cover in color. Three tiers of panels per page. Script credit for this sequence from Alberto Becattini (May 14, 2007)