When I was a kid I read a story in a collection or anthology (and I've always had the impression that it was the last story in the book but can't be sure and it's not all that relevant) where dogs were secretly super-intelligent and were actually the benevolent masters and considered humans their pets, allowing the humans to think the reverse. They considered it very important to keep this knowledge secret from the humans. It's an older story, written in the 1960's (maybe early 70's at a stretch) or before.
I had thought it was written by either Ray Bradbury or Isaac Asimov but could find nothing even similar by either them. I've tried for years to turn this story up again, searching loads of collections by various authors and anthologies but have had no luck and trying to search for it on the internet hasn't helped either. I'm hoping someone will recognize it.