Why do people bring dogs to parades and art shows? They bark at each other, and really don't listen when their owners yell at them. Small children are just moving, threatening objects. A dog’s sense of smell is about 1,000 to 10,000,000 times more sensitive than a human’s (depending on the breed) so imagine how they are interpreting the crowds and food tents! It also is very painful to their sensitive ears when 8 fire trucks, ambulances and police cars start those sirens. Dogs detect sounds in the frequency range of approximately 67 - 45,000 Hz (varies with different breeds), compared to humans with the approximate range of 64 - 23,000 Hz. Plus humans have better vision, so it sort of defeats the purpose of bringing them to parades--unless you're just showing them off.