The stream of milk becomes finer and finer until it finally ceases altogether, and a firm cord is felt running through the teat.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
This may be limited to a small area near the lower end, or it may extend through the whole length of the teat.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The movement is limited by the elasticity of the inner membrane of the teat from which it grows, and is somewhat freer in certain cases because the growth has become loose and hangs by a narrow neck.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler