What is the fine-grained topic of the following text: Cribbing is defined as a “vice in which the horse bites or places its upper incisor teeth on some solid object, pulls down, arches his neck, and swallows gulps of air which go into the stomach, not the lungs.” It generates a high for the horse and can kill them over time when the air in their stomach makes them feel “full” and reduces their urge to eat. Only return the topic.
Cribbing in horses