For example, a cat named Bella fell in love with a rabbit named Poppy, and the two of them spend their days grooming and cuddling each other. In an even more unusual case of interspecies friendship, a cat named Ranj hugged and kissed and cuddled a rat named Peanut.
While these interspecies friendships are quite special, Haddon points out that they're also pretty rare. "Never leave your cat alone with, say, the house rabbit," Haddon said. "Always supervise. Where animals are concerned, it's better to be safe than sorry."