Spirit got me bawling when I went to see it because I had just put down my horse Khan, whom I had in my life for 20 years. The scene with the horse dying just about did it to me. It was many years before I could watch it again.
Another recent movie is "War Horse". I actually had trouble with it because I want the horses to act like horses, and there were some scenes that were just hard for me to swallow--such as the horses standing absolutely still while the German soldiers were there, or that they laid down on wood floors. Just not natural horse behavior IMO.
I wanted to see some of these but when I requested on Netflix, they never had them. How do you ever find these to watch them?