Someone in the newsgroup expressed surprise that he didn't get any
special message after surviving the eating of a cockatrice corpse. Combine
the cliche that unconventional meat inevitably tastes like chicken with
the mythology that cockatrices are a bizarre hybrid of chicken and reptile
(or whatever). This will give a message about tasting like chicken for
corpses or smelling like chicken for tins when the hero has petrification
resistance (poly'd into a xorn, for instance) or is hallucinating.