I've seen several different links to the UT study about cats and dogs, which I haven't read in its entirety because I consider comparing humans to animals to be about as relevant as comparing humans to drinking glasses*; however, The Lovecraft News Network points out that in his 1926 essay Cats and Dogs, H.P. Lovecraft had already said almost exactly what the UT scientists have just confirmed through scientific tests(!).
Anyway, follow the link for the essay in case you need to add it to your "stuff Lovecraft wrote that probably isn't in very many books" collection.
*For the record, I like both cats and dogs, but for different purposes. I have a cat personality and am a glass tumbler.