Very good reminder, it got so hot here so suddenly, and a few weeks ago at playgroup Spud overheated,he won't always drink water when he needs to, he was panting hard and a bit out of it, more than his usual goofiness, I took them both home ASAP and hosed him down in the backyard. He is fine, but now I keep a close eye on how much running they've done, and if another run wants to start up, I hold on to my two, keeping them in the shade.
This said, all the other dogs ran just as much, including Karma, and they were fine, so keep in mind each dog is different, I now err on the cautious side. Luckily he will come to me when I call him, even while running with a pack, otherwise I would have to stop going, it's hard catching a Grey in full run.....