I'm aware that there's a school of thought holding that domesticated animals are virtual-cynical automata evolutionarily programmed to simulate love and devotion. I do not completely dismiss this modelÂthese creatures have had hundreds of thousands of generations to adapt themselves to, and to exploit, the emotional tropisms that a territorial, highly-social primate brought with it out of the savannah a million or more years ago. I don't doubt that many people project their emotional states upon their pets. And yet, and yet...
I believe that our own emotions emanate from a substrate deeper than our human or even our primate heritage. Threat displays ("Bad dog!") and gestures of affection "Good dog!") are registered at a level far older than language, and common to our respective species. Daniel Dennett once observed that while our closest primate relatives might hover near the threshold of language, it was the domestic canine, notwithstanding the species' cognitive disadvantage relative to the chimps, that had been for tens of thousands of years under intensive selective pressure to comprehend human intentions. I don't think that we're projecting when we attribute "love" to dogs: they are returning that—perhaps without the abstract nuances we are wont to bring to bear, but also without the neurotic qualifications that accompany those considerations.
I wasn't really a "dog person" in my younger years. I'm better for being one now.
cordially,