How Now See Through Cow- Front Row View on a Bovine Stomach

Behold the fistula.

It’s guaranteed to creep people out, but in the world of cows and other such creatures, it’s routine. “Animals can live a surprising amount of time with a permanent hole to their stomach, especially if it is a surgically made fistula.” There is a reason:

Agricultural scientists learn about the digestive system of cattle by putting holes in cows–and the cows stay alive and well. These cows (fitted with a sealing cover called a “cannula”) each have a hole into their stomach. Through this hole one can extract food caught mid-stream through the digestive system.

Fistulated cows are used to research the digestibility of different foodstuffs for cattle. One can feed the cow, then later catch the food while it’s digesting to see how it’s doing. Without fistulated cows, one would have to look at external factors in order to garner information about the best food for cows–none of which are as accurate as food sampled right from the stomach.

The site explains that cows with fistulas live longer since it’s easier to treat them when they have illnesses in their digestive systems. I can add that a fistulated cow is liable to have a long life because she’s more valuable. Apart from giving milk, having a fistula is the nearest thing, in a cow, to having a useful talent.

I know about these things because it so happens that, in my life, fistulas are pretty routine. I work at UC Davis, where we have a big experimental dairy herd, and a number of the cows are fistulated. Although, jeez–the fistulas in these photographs are huge compared to ours. They’re like portholes. You expect to see someone inside the cow, peering out.

Link [Oddity Central]