It fell back, shuddering convulsively, and suddenly regurgitated a small, furry animal.
"Cat and Mouse"
Ralph Williams
This is necessary in order to prevent pneumonia, caused by regurgitated feed entering the air passages and lungs.
"Common Diseases of Farm Animals"
R. A. Craig, D. V. M.
If the passage is completely obstructed, food and saliva-sometimes blood-stained-are regurgitated with retching soon after being swallowed.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson