I agree that killing the dog in I Legend was a really difficult thing to watch even though it was for the dogs own good, I cried and cried.
I Read Marley and me and the book is great, laughing one minute then crying the next, then i went to see the film and was pleased they did a good job of it, then I cried and cried again. [get me a bucket]

I think The Green Mile was one of my all time sad films too, what do you think - anyone remember it.
But the animal ones get me every time.
Oskar