The cows with holes in their sides – Channel 4 News

A Swiss company has released footage of14 cannulated cows - cows that have a hole in their sides that allow farmers to look into their stomach and ensure more balanced feeding for the animals.
A Swiss company has released footage of14 cannulated cows - cows that have a hole in their sides that allow farmers to look into their stomach and ensure more balanced feeding for the animals.

Beaver Smithsonian's National Zoo and Conservation Biology Institute

Switzerland cows fitted with portholes to test digestion

Acadiana families carry on 4-H tradition by raising, showing animals

Farmers dig out cow stuck in cliff hole in Cornwall - BBC News

Lincoln Uni cows used for 'cruel and barbaric' research

Cows with stomach 'portholes' draw ire of French animal rights group - CGTN

Switzerland cows fitted with portholes to test digestion

Cow Smithsonian's National Zoo and Conservation Biology Institute

Why Do These Cows Have Holes Drilled Into Their Sides?

Are the US and Syria now on the same side? – Channel 4 News

Switzerland cows fitted with portholes to test digestion