My initial inclination is to assume this is a ‘dogwide’ phenomena even though two examples is a little light for a scientific study. I’m sure you’ll let me know.
As I type Roxie is on her back on the rug in our foyer. Her snout and chest are in the shade. The area from her belly to her rear legs are in full sun.
She’s relatively motionless right now. In and of itself that’s unusual. As a teething puppy Roxie is usually in motion playing with her toys or biting at something or someone. It’s nice to see her adopt this more adult behavior.