I have it on VHS somewhere, recorded off the TV, but there's an animation from 1980 called Scruffy which I loved as a child, which seems to be pretty damn hard to find. Google tells me it was an "ABC Weekend Special".
Scruffy is the story of a puppy who's orphaned. As she attempts to find a new home, she's constantly struck by tragedy.
This tear-jerker animated film originally aired on "The ABC Weekend Special," and was later released on VHS. In addition to other familiar names in the animation world lending their vocal talents, young Nancy McKeon voiced a character.
Anybody remember it?