Utilitarian philosophy is actually pretty reasonable when it is applied to humans. I had never seen anyone attempt to use it to propagandize animal "rights".
Sigh, now I have to look up WHO is doing that and why they are abusing the philosophy.
In any case, even when we weigh benefit to humans versus "harm" to animals, we have to weight the value of human life far above that of animal life.
RE: In defence of meat: Reflections on society, ethics, experience, and current scientific knowledge – Part II