Discover the reasons behind your dog's panting, especially at night. Learn about the common causes of excessive panting.

PRESCOTT, Ariz. (KPHO/KTVK/CNN/CNN Newsource/WKRC) — A ranch dog rescued a missing toddler who wandered the desert at night.

A 2-year-old boy is safe after walking about 7 miles and spending the night in mountain lion territory in northwest Arizona.