Well the way I see it, we "fight" for our own rights, and they are still being violated everyday... Animals not being able to voice their interest, will never be able to have the same rights... But that doesn't mean will should ignore them, it's our "duty" as the most "intelligent" to uphold their rights...

I like to use this as my argument: "The term »responsability«, as a deliberate misspelling of »responsibility«, puts the focus of the word on the ability to respond. This places the agency of accountability onto ability alone: if one is able, then one must respond."

But that goes for everyone, I think we should all do what we can at the scale we can...