Well, since I didn't get any reply, I'll lay out some hypotheticals for those who cite utility or the base superiority of man, as the reasoning for morality.
1) As I said, drowning carer of a man with downs syndrome, and his ward. Who do you save? The carer is more useful to society, and the man with downs syndrome is even less capable of fighting to save himself. What moral difference is there between saving the lives of either of these two people?
2) Would you save a person who had helped you personally (Say a surgeon), or a man who helps many, say, the head of an international charity? Can you justify one as being unworthy, on the basis of morality, to be saved?
3) If the utility is of the greatest import, should not organ donations be reserved for the most intelligent, ambitious and capable? Should we not let those less worthy die, as they will never have the same worth?
4) (For a reversal of utility) A man of lower social standing (He's scum, white trash, trailer trash, a bogan, what have you), or a homeless man, is drowning, as is the dog you currently look after. The dog is with you as a part of a guide dog training program-he's not yours, you're socialising him. The dog is obviously more useful than the bogan, and the bogan would despise you under any other situation, and apart from being enormously cute, the dog is affectionate. Which do you save?
I put to you that it's not a moral difference we're talking about guys, it's a personal one.
I have a few sections I split morality into.
1) Enforcable principles most useful to a happy, flourishing society, and the individual pursuit of happiness.
These are things we put into law. Duh.
2) Standards we would like to apply, as a part of ensuring the individual pursuit of happiness (I'd rather everyone would save everyone, so then I'd be saved [which answers the appeal to emotions too]), however, these are unenforceable, since, there's no wrongdoing in not risking your life for something. (In fact, to get technical here, saving the pet is morally good. Saving the person is morally good. Cause the default state is, they both die. You've reduced harm and suffering, you've done good).
3) Codes we'd like to consider morality. These are unjustified biases we have. Our love for others is one. Our loyalty to our tribes, whether that be species, or race, or political group, or religious views. These aren't a part of morality, and are not rational moral justifications.
I would put it that whilst 1) is the most applicable form of morality, 1 and 2 are what I'd consider morality in general. Which leaves us with the question: Is a dog worth more than a person, or vice versa? The utility is not the factor, nor longevity, nor the love we bear. I would posit that from the standpoint of beings, many animals are equivalent to humans, and can be justified so under 2)-we'd like to treat these animals nicely, but their lack of understanding of our principles makes their reciprocation impossible, and the enforcement of morality on most animals a fruitless endeavour.
Me? I consider my dog a part of my family. I love her, and she loves me. She's a very stupid and easily excitable member of my family, but so are children, so I'm not holding that against her. She is averse to pain, and understands that some things will cause harm, and some things will upset people. Any of us who've trained a dog out of biting people knows that the basic moral principle of not causing harm is trainable: Simple classical conditioning is used, basically like our justice system.
If I'm ever in danger, she tries to protect me-as I do her. Once on a walk, we encountered a venomous snake. She's got no way of knowing it is dangerous, but she acknowledged my fear, and followed my lead, and neither of us was bit. We're a community, and that's that. Just because she's stupid and useless does not make her worth less, and my love does not make her worth more. But ultimately, I'm going to judge based on my love, and consider beings as equals.