Sled dogs howl for different reasons at different times of the day. When the girls are in heat is probably the busiest time of the year for singing. They'll howl several times per day. Some dogs are really vocal and they will get the entire pack going. Reasons sled dogs howl: - they're mad they didn't get picked to go running - after dinner thank you song - after breakfast thank you song - females in heat - they're happy and content - hear other wildlife like wolves or coyotes howling - their pa

These sled dogs leapt with excitement as their trainer readied them to travel through fresh snow in Willow, Alaska. | CBS News