What do pigs snore and chickens do?

Crow. Cock crowing is an instinctive reaction under the light stimulation of biological clock and hormone control in the body, so the pig snores and the chicken crows. A cold joke means that the joke itself can't achieve the funny purpose because of boring, homophonic words, translation, or omitting the theme, different logic, judgment or special content, or because of the tone or expression of the performer.