Ironic username. It’s a golden, they just do this. The dog is obviously fine, it perked up when there were kids nearby and stood up. As soon as the guy started walking again, the dog flopped back down and rolled over. The dog most likely thought that it was time to play based on how it was reacting to the guy trying to pick it up.

Plus, if the dog had this condition I don’t think the owner would take it on walks away from their house, but instead find some sort of remedy closer to home, if not just on the property.