Really? In most movies, dogs are major characters. The death of any character is a spoiler. Spoilers are big deals for most people, myself included. If I want to see a movie, I go in blind. It's part of the experience for me.
It would take two seconds to edit your post, and you wouldn't look like a fucking asshole to some people.
You're a raging douchebag, therefore your opinion means nil. To me, and many others.