What sound is the dog afraid of?

Dogs are most afraid of hearing loud roar like thunder, firecrackers and fireworks.

Dogs will become very nervous after hearing this sound, and they will keep barking and curl up in the corner. The owner should not scold or beat the dog at this time, which will make the dog more afraid. The owner can try to comfort the dog and cover his ears.

The voice that a dog is afraid of must be the voice of some animals that have a great influence on it, or the voice of its natural enemies, because for a dog, it is essentially a wild dog and then becomes a domestic dog, and it must have something to be afraid of.