A stock image shows a dog asleep on a couch. A video of a dog checking on her senior pup sibling as he was "whining in his sleep" has touched users on TikTok.

Woofus isn’t the only sleep-deprived dog in this study. On other days in the clinic, Jake, a 13-year-old pointer, and Coco, a 12-year-old dachshund, among others, might be taking a siesta while ...