Dogs and humans in sadness

People use dogs in guarding, hunting and pulling carts. It was used in the war to guard and carry messages. There are also trained dogs that lead the blind and deaf in the streets, and domestic work, such as alerting the deaf to the phone or door, or leading the blind to wander inside the house or cross the street. And some types of dogs have a strong sense of smell. That is why he was trained for other tasks, such as detecting drugs, fireworks, dynamite, Persian ants and drowning in deep water. The missing can be searched for in earthquakes and fires, and some dogs can listen to sounds that a person cannot hear with his ears, so that the dog is able to hear the ticking of the clock 40 feet away. And domestic dogs vary in shape and appearance, size and color.
Attention should be given to dogs