He who eats the flesh of animals are who desirous of living but who have been slain by either himself or others, commits the sin of slaughter for his this act of cruelty.
यो हि खादति मांसानि प्राणिनां जीवितैषिणाम्। हतानां वा मृतानां वा यथा हन्ता तथैव सः॥