My essay is a first analysis of the fundaments of the animal ethics. Reflections contained in the studies of Tom Regan, of Peter Singer, of Gary Francione are examined in order to present positions which – despite the differences existing between each other – are in favour of the extension of (at least) some rights to (at least) some kinds of animals. I have chosen the positions of Peter Carruthers in order to present positions being strongly against any extension of (...) rights to whichever kind of animals. This essay will be followed by further investigations. (shrink)