What do we know about cats? For years, dog and cat owners have been bickering over the relative merits of each type of pet. But in recent years, scientific researchers have started to weigh in — and most of their findings so far come down firmly on the side of dogs. Compared to dogs, scientists have found, cats don't seem to have the same sort of emotional attachment to their owners, and show genuine affection far less often than you might think. Further, they're an environmental disaster, killing literally billions of birds in the US every year — many of them from endangered species. Moreover, they offend their major rivals - dogs! Watch Pixel, 10-week-old french bulldog, trying to reclaim bed from cat who doesn't really care of the dog's needs.