I get steamed when I see well intentioned dog [guardian's] running with their dogs on warm/humid days and the dog is obviously hot/tired and exhausted. [I've observed this when people are out hiking too far & too fast w/their dogs too].
In an effort to get exercise and put in "x" amount of mileage for themselves and their dogs, they often ignore the signs that their pet is in distress.
Dogs aren't very efficient in cooling themselves no matter what breed, age and in shape they're in!!
Please use caution.......and carry 'lots of water!!!