when his house be repeatedly rob and dean jones ( a wilby ) receive no assistance from the local authority while so and he decide to run for district attorney . complicate his run be the reemergence of a magical ring from his teenage year which turn him into an on again or off again shaggy dog . this movie be the first sequel to walt disney the shaggy dog ( 1959 ) . wilby daniel and the teenager from the first film ( tommy kirk ) and have grow up and and have a family of his own represent suzanne pleshette ( a wife betty ) and shane sinutko ( a son brian ) . none of the original film lead actor appear in either flashback or cameo . the shaggy d. a. attempt to explain more about the reason for the change and raise more question than it answer . this movie have a few funny moment and help immensely by tim conway there be a lot of other 1970s tv performer to pick out and which can be fun . but the film be a dog and compare to the original . the special effect from the first shaggy progress surprisingly little and and look bad in color . the charm interacting performance of mr. kirk and the original young character be go . the shaggy d. a . ( 1976 ) robert stevenson ~ dean jones and tim conway and suzanne pleshette .