Philosophical discussion concerning animals' pain has focused exclusively in the moral feature. In this paper we aim for a more fundamental question, namely weather or not animals are capable to feel pain. To settle this matter we will show why phenomenology seems to be the only philosophical perspective that can fully grasp pain experience. Phenomenology allowed the philosophical discovery of lived-world, the philosophical discovery of conscience as a form of meaning, as well as the philosophical discovery of self as an affective and feeling structure. Nevertheless, the main philosophical contributions of phenomenology seem useless to grasp animal pain. That being said, we will conclude this paper by sketching some insights to develop a ph...