Dude, chill. What the hell is your problem?
I just figure that there's not really much point in this discussion, seeing that there's no way you're going to prove anything either way. Far as I can see, it's all speculation. "Dogs are no different to Tamagotchis! No consciousness!" "I disagree, they're like humans, so they probably possess consciousness as well!" "Who says humans are conscious beings?" "I do!" "Well, I don't!"
Furthermore, my moral system isn't based on some rule like "Don't harm conscious beings." Why not? Why not harm conscious beings? 'Cause it hurts them? So what? That presumes you give a damn in the first place. 'Sides, may not be conscious in the first place. No, my morality is "enlightened self interest," I believe. Do to others what I'd like to have done to me, really. Consciousness doesn't really enter into it. Empathy does, I s'pose, but that doesn't really require the object to be sentient.
Bleh. I just can't find it in me to get worked up about unanswerable questions, sorry. Ones like these, anyway. Let's do the one about clones, that's always fun.