Scientists know.
For eternal cat lovers everywhere, this is going to come as disappointing news: our feline friends don't care about us as much as dogs do.
As part of a new BBC2 documentary called "Cats v. Dogs", hosted by animal experts Chris Packham and Liz Bonnin, a neuroscientist has tested which of our favoured pets is likely to love us more.
Scientists already know that dogs - like humans - release oxytocin, also known as the "love hormone", when they are in contact with their owner. The test has previously never been carried out on cats.
"We have pretty good evidence that dogs actually love their humans,” according to Dr Paul Zak, who conducted the study. "A couple of small-scale studies have shown that when owners interact with their dogs, the human and their dog appear to release oxytocin.