The wagon atop the pile in the junkyard is the one that crashed and injured Trusty at the end of Lady and the Tramp (1955).
The Dogcatcher character's design and voice were based on Don Knotts' Barney Fife character from The Andy Griffith Show (1960).
Disney based the design of Ariel from The Little Mermaid (1989) on Alyssa Milano's character Samantha Micelli from the series Who's the Boss? (1984). Jodi Benson is the voice of Lady in this movie and Milano is the voice of Angel, Scamp's love interest in this film.
Scott Wolf and Alyssa Milano, who voice Scamp and Angel respectively, got engaged in 1993 but broke it off in 1994. They starred together in Double Dragon (1994).
HIDDEN MICKEY: (at around 1 min) Seen in the upper left-hand corner of the screen during the scene under the INDEPENDENCE DAY banner.