You're still anthropomorphising too much by comparing it with an animal. A large amount of an animal's behaviour is genetically determined, wrought by Mother Nature step by step in thousands of ad-hoc adaptations, and we simply don't know what many of those adaptations are. They come together in something of a cohesive whole, each part depending intricately on all previous parts, and that's why we socially understand dogs to the extent that we do: lots and lots of the machinery that makes us both is shared.

By contrast, hopefully we'll design our AIs according to, say, engineering principles. That way, we can know what its motivation is, which I'm sure you'll agree is very important when creating something that is potentially substantially smarter than us. This is so unlike any other intelligence we interact with, that there's no particular reason we should be able to compare it to them.