Have you ever been at the dog park and seen two dogs get in a fight? Or heard of a dog that viciously attacked another dog “out of nowhere?” In reality, dogs give plenty of signs of fear or aggression before things escalate to a fight—signs that often go undetected or get overlooked.

Dogs obviously do not speak English but they do have their own communication cues that you as a pet parent are responsible for learning. Being in tune with your furry friend’s communication signals will help prevent problems and may even save your pet’s life—of the life of another pet your dog might attack.

You may know some classic cues, like raised hair on the back or baring teeth, but did you know hiding behind your legs is a problem, too?