What the fuck is wrong with me? Last night, I dreamed that there were a bunch of puppies with me in some underground mine shaft. They grew fangs and before they did anything, I began smashing their heads against the walls because I knew that if I didn't do it, they would kill me. I feel so awful about it now; I love dogs and I've never done anything violent or wanted to do anything violent to dogs. I'm really scared, /adv/!
it sucks, but disturbing dreams do sometimes happen try to put it out of your mind if you can
If you're worried about this having some kind of deeper meaning then don't, the overwhelming consensus of the psychiatric community is that dreams have no psychoanalytical value and are simply experiences that are randomly created by the mind. The fact that you killed dog-monsters in a dream does not say anything about your state of mind, it doesn't say that deep down you secretly want to hurt things or are fearful that things will hurt you, it merely means that of the infinite possible combinations your mind could have created last night this was what it made.
Don't worry about it. I had a dream once just about watching some alien, tentacles, Lovecraftian monstrosity get examined. It was my first wet dream and I was 16. Shit happens.
Well be fine :)