Did you know that a dog can make up to 100 different expressions just with their ears? The express what they are thinking with the movement and if you pay close attention you can know your dogs mood and what they are thinking.
A dog with ears that are raised up mean they are alert.
Ears leaning back can mean they are in a submissive mood.
Ears leaning back and the dog is growling, means attack mode.
A dogs hearing is 10 times stronger then ours, so if you wonder why your dog may appear upset during a thunder storm, it is much louder to him the you.