How big is a cow's esophagus?

Asked April 9, 2013, 7:32 PM EDT

We are developing a bolus to be given to cattle and would like to know what the diameter is of a cow's esophagus. What is the largest bolus that can be administered? Currently, our prototype is 50 mm (2 inches) at the widest part. Is this too wide?

1 Response

It may be possible for a cow to swallow a bolus that is 50 mm in diameter. Cows have been known to eat whole oranges and potatoes without problems, but occasionally those may block the esophagus. We successfully use boluses that are nearly 25 mm in diameter and 62 mm in length.