"Portholes" in cows denounced by French activists The French animal rights group L214 denounces the use of plastic "portholes" being surgically inserted into the sides of cows. The device that can be opened, allows direct access to the largest of their four stomachs in order to optimise and regulate nutrition. The deputy secretary of state for Ecological Transition says that while the method looks shocking, it is useful. IMAGES of cows with "portholes"