From the first stomach regurgitation takes place; that is, the food is returned through the gullet to the mouth to be more thoroughly chewed, and this constitutes what is known as "chewing the cud."
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
It was his supreme merit to have been the first to describe in all its details this type of heart disease, and the distinguished French clinician, Trousseau, declared that aortic regurgitation should be called Corrigan's Disease.
"Makers of Modern Medicine"
James J. Walsh
Here it is subjected to a churning movement that mixes and presses the contents of the rumen forward in the direction of the oesophageal opening, where it is ready for regurgitation.
"Common Diseases of Farm Animals"
R. A. Craig, D. V. M.