Dog owners, this will confirm what you always thought. And cat owners, prepare to extend your claws: Scientists at Oxford University claim canines are smarter than felines, the London Daily Telegraph reported yesterday.

And the reason, according to the researchers, is that dogs are more social animals and, therefore, have bigger brains.

The study, published in Proceedings of the National Academy of Sciences, charted the evolutionary history of various mammals’ brains over 60 million years and found a link between the size of an animal’s brain in relation to its body and how socially active it was.

Dr. Susanne Shultz, who led the research, told the Telegraph, “It appears that interaction is good for the brain and extends to other species, like ourselves.”