What term is used when feed becomes lodged in a horse's esophagus?

The term used when feed becomes lodged in a horse's esophagus is "choke." This condition occurs when food material obstructs the esophagus, preventing normal swallowing and leading to distress for the horse. Unlike colic, which refers to abdominal pain and can have various causes unrelated to the esophagus, choke specifically pertains to issues in the esophageal tract.

Blockage is a more general term and can apply to any obstruction in the digestive system, not specifically to the esophagus. Impaction refers to a specific form of blockage, usually in the intestines and is characterized by a buildup of material that can lead to colic, but it does not imply an obstruction in the esophagus itself. Therefore, "choke" is the accurate term that directly describes the situation of feed being trapped in the esophagus.