I saw a movie when I was a kid (1970s) - can't remember title, but it was the most upsetting one I can think of. The father didn't like the dog, so he took it with him 'fishing' on a boat. Tied a rope around it's neck and the other end to a cinder block and threw both overboard. I screamed and cried for hours!!! I wish I could remember the movie, just to know why he did it (I was so young, that's ALL I remember from this horrible movie). It was on regular network TV, so don't know if it was a made for tv movie or if it ever got theater release.