Originally Posted by
Alextanium
Pets exhibit prominent emotions and emotive facial expressions because we have bred them that way. We domesticated dogs from wolves and dingoes at least 10,000 years ago, and ever since that time we've been selectively breeding them for their intelligence, their temperament and their obedience. We've also been breeding them for their 'cuteness', which is why your common house dog will look like he/she is smiling when you pet it. We have bred this trait into their mainstream gene pool because we LIKE to see it. They aren't gaining consciousness by osmosis just by being around us.
If you look hard enough, there is a naturalistic explanation for everything. You don't have to invoke the supernatural every time you come up against a brick wall and say "I don't understand this, therefore - magic and souls". The most honest thing you can do is say "I don't know - but I want to find out, and I want to get it right".