Disregarding the fact that we're animals, yeah I care about people - my own kind - more.
And FlipMo, incase you didn't know, that 'loyalty' is a survival tactic. Domesticated animals were once wild but found that if they acted 'cute' & played around, that they could have an easy life. Being animals of limited intelligence, what they didn't know was that in future generations their bloodline would lose the majority of it's instincts that it had previously needed to survive - in other words, most domesticated animals can no longer survive without their keepers & thus, are almost forced into their 'loyalty'.
And the ones that probably could make it, well, why ruin a good thing when you can play the 'loyal' role. But the so-called domesticated animals who still have those prior instincts lurking near the fore will become 'disloyal' if you push them too far - that could be hitting them, or just not feeding them right away.