@Routganan: The Fox and The Hound. My least favorite was Lady and the Tramp. I have never watched past the point where the dog is chewing through the bars and whimpering. It hit too close to home. Later on, we had a dog who lost his teeth that way.

By later on I mean way later. My original issue was that I get separation anxiety even to this day, and identified way too well with the dog. Still do.