1.) While both humans and canines are animals, humans are of higher intelligence experiencing a higher range of emotions and awareness than that of a simple dog that in its lifetime may learn a handfull of tricks. Where as the human could be the next Einstein or Da Vinci.
2.) While animals do generally protect their young, they are also known for eating them and engaging in incestual activities because they generally don't adhere to a moral code.
3.) While animals "do not have a voice to speak up for themselves", people are the only animals I know of who can or even would push for legislation that would protect said animals... Which would be pretty hard to do if said hypothetical legislator drowned because a dog was saved in a textbook example of misguided idealism.
4.) Animals would never choose another species to save if given the choice between their own and another.
That said, I do believe in animal rights and abhor those who partake in animal cruelty. But I can tell you right now I would save the human without hessitation. As for the person who left in a fit because I called out her stupid argument, I'm not sorry-and if you are going to throw out such an obtuse statement, it would help if you didn't eat meat.