Can our beloved cats and dogs love us back? This chapter aims to find a satisfactory theory of love that substantiates the claim that they can. It begins by reconstructing and critically evaluating recent attempts by scientists to show that dogs can love humans back. Although these attempts are argued to be unsuccessful, it is further argued that they illuminate the need for an adequate theory of love and offer us some plausible ideas about love that direct us to two (...) recent philosophical theories of love that support the idea that dogs can love humans back. These two theories are discussed in detail before it is argued that dogs, but not cats, seem capable of loving humans under these theories. These theory-based defenses of the belief that dogs can love humans back are then criticized on the grounds that the theories they use are unsatisfactory because they fail to capture three central truths about love. This leads to a third theory of love that, after some friendly amendments, is argued to be a tentatively adequate theory that provisionally vindicates the claim that dogs, but not cats, can love humans back. (shrink)