What I find most interesting is the arrogance of those that post that dogs or other animals have no emotions or feelings. Having been a dog owner most of my life, I can only remember about 6 years in my life where there wasn't a dog or cat around as a pet.
I can say with some authority that dogs especially do have emotions. And I can also say that if a dog is raised with respect and caring, it will be very loyal and protective. To the point of giving it's life for you. They express saddness, guilt, fear, rage and happiness regularly.
I have watch my dogs place themselve between my wife and any danger they thought was near. They do it without thought of danger to themselves. My little Boston Terrier will do everything in his power to stop an arguement between my wife and I. He will get between us and whine and act up to draw attention, and is always happy when the anger is past.
Just a few thoughts of my own, but I do think that dogs and humans have a different link than other animals and humans. IMHO.
I find a certain inspiration in the nobility and seemingly infinite patience that I've seen in my dogs. They have been my teachers in how to be a better person. It's a debt I hope I am in some way able to re-pay by returning as much of their devotion to me with my own toward them. Anything less saddens me.