Serious Eats
Pet Sweat: Only in Japan, Kids
Photograph from Kellyhyde on Flickr
What I'm guessing is that, as a commenter says on the page that this photo appears on, is that this is simply a version of the Japanese sports drink Pocari Sweat that's marketed for people to give to their pets. Yes, Pocari Sweat itself is a zany name, but as you know, you can never account for translation.