Final answer:
Pigs are prone to laryngospasm during endotracheal intubation.
Step-by-step explanation:
During endotracheal intubation, laryngospasm can occur in certain species. Of the options given, pigs are prone to laryngospasm. Laryngospasm is a protective reflex that occurs when the vocal cords spasm and close off the airway, making it difficult to ventilate the animal.