Issodhos,
For those of us involved in animals professionally, or as a serious hobby, 'animal rights' is not some ill-defined philosophical concept. There are groups(PETA, HSUS, DDAL and many more) who have defined what 'animal rights' are, and are working diligently to assert those rights legally, using the political process, as well as violently, using terroristic tactics(lab bombings etc)
PETA? Now that is a self-righteous group who has totally failed to control their raging inner fascist, wot! :/
Yours,
Issodhos