In the comments, viewers have shared their own stories of ageing pets, many admitting they'd never noticed the change until it happened. Videos like this often hit hardest because they're so personal.

this is the dog for you! Although many people think of Great Danes and imagine a brown one with black spots, Great Danes do ...

In 2015, a brown and white puppy with floppy ears wandered onto ... Bodin Allen lost under a full moon in the high desert. That dog, Buford, got famous this week after shepherding Bodin to Dawn ...