The bottom line? For dogs, stretching and shaking is likely hardwired instinct.
"We think we are the brightest ones and oftentimes, we don't follow what our instincts are telling us," Lia Marques, a trainer with Marley's Mutts, tells The Dodo.
Which is why dogs might not be so much copying humans when they stretch - but rather reminding us to to do it every day. Because it's good for all of us.