My best friend lost her first dog, a gorgeous black Lab named Chewy, to a hot summer's day years ago - and it's a story that has stuck with me ever since.
Thirty minutes after arriving at a park, after keeping activity minimal, after playing in the shade and after providing Chewy with copious amounts of water, my friend's Lab went into shock and had a seizure. With the help of an off-duty police officer, Chewy was rushed to the nearest animal hospital.
But he died just a minute before arriving, in my friend's arms, after she tried a last-ditch effort to give him CPR.
"I was hysterical," she told me. "I still blame myself for taking an older dog out on a hot day."
She didn't know any better.