Depends on how sophisticated it is. My iPhone has been able to correctly identify and tell apart different cats for about 3 years now and gets it right 90% of the time.

And before I get the comments: yes, I’m about to fully leave the Apple ecosystem.

Yes absolutely it does. If you use Google Photos or Apple Photos they will handily identify every instance of your dog’s face. It’s not quite as accurate as people, but they’re perfect capable with little effort.

Yes. Immich works great at separating out pets.

It's not just facial recognition anymore, though, they're looking at all kinds of other stuff, even how you walk.

"Here are 4000 images we took of quadrupeds within 5 miles of your house."