So if you write a story and say "I walked into my room and saw my dog eating chicken!"

You probably meant to say that you saw your dog, eating some chicken. As a chicken that can eat a dog doesn't make sense. And sure everyone will get what you're trying to say, but you'll still get a nice X beside that phrase from your english teacher.

Wait.... you never went to college did you?

Ummm... did you graduate highschool?

Looks like your brain isnt as complex as you think it is