Quote Originally Posted by Jessika
It does not matter if a dog is outdoors for five hours or five minutes. Heat stroke can happen unannounced and without warning regardless of how long the dog has been outside.

That is not true for people, so I cannot imagine it is any more true for dogs. The longer you are out in the sun, the more of a danger of heat stroke. It doesn't strike suddenly, it is a gradual thing.

My 2 cents, as I was blonde as a small child, am still fair-skinned, so my parents were always careful about how much sun I got at once (and vigilant with sunblock, as, being human, I don't have a plush fur coat to protect me)!