This paper discusses the experience and ideology of emotions among ani
mal rights activists, and more broadly, the applicability of the socio
logy of emotions to the field of social movements. I examine the case
of a social movement which relies heavily on empathy in its initial re
cruitment, and which has been derisively labeled by outsiders as 'emot
ional'. I explain recruitment to animal rights activism by showing how
activists develop a 'vocabulary of emotions' to rationalize their par
ticipation to others and themselves, along with managing the emotional
tone of the movement by limiting the kinds of people who can take par
t in debates about animal cruelty. The interactive nature in which emo
tions develop in social movements is stressed over previous approaches
to emotions in the social movement literature, which treat emotions a
s impulsive or irrational.