Yesterday Lead Game Designer Wan Hazmer commented on that on his personal Tumblr, and while he did mention that the special cameras aren’t planned for the game at the moment, he gave pet lovers a bit of hope:
Dog Cam and Cat Cam… I wonder what’s next! We don’t plan to put these into the game but if you shout loud enough we might consider it ; ) What say you?
While implementing the pet cameras might seem elementary at first sight, it’s not that simple. Dog and cats might be able to reach areas that humans can’t, forcing the development team to model elements of the environment that they normally wouldn’t need to include, exactly because they’re unreachable.
So there you have it. If you want to wander the world of Final Fantasy XV as a dog, or a cat, or as whatever might come next, you better start shouting.