I love shooting dogs in front of my friends in videogames
Why do you like shooting dogs in video games?
I like to see their whining.
Video games can reduce negative emotions, such as frustration in stressed individuals and help to manage your feelings, such as anger and stress. As long as you can separate fantasy from reality, what you do in a video game is healthy and normal.
But I enjoy seeing their whining and dying.
I think this kind of behavior is very serious. I think you should seek professional help about this.