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Do twine and net wrap pose health risk to cattle?

Curt Arens Bales of hay and snowed covered field
CUT IT OUT: Although it may take a little time, it is always best to cut as much twine or net wrap as you can from baled hay and other forages being fed to cattle. The concern is not as great with forages that are ground before feeding.
A specialist explains net wrap management on fed hay and cornstalk or forage bales.

Is twine or net wrap good feed? Obviously not, but it can cause health problems if animals eat too much of it. Feeding hay is work. To lighten the workload feeding hay, we often take shortcuts and leave some twine or net wrap on the bales. And whether we want them to or not, animals eat some of that twine.

There is the potential for twine to accumulate in the rumen of cattle and cause obstruction. Research at North Dakota State University has confirmed this risk and provided further information on what happens to twine when cattle eat it.

In a series of experiments, the North Dakota research first showed that neither plastic net wrap nor biodegradable twine get digested by rumen microbes. The old-fashioned sisal twine, however, does get digested, although much slower than hay.

In another study, net wrap was included in the ration fed to steers for an extended period of time. Then, 14 days before the steers were harvested, the net wrap was removed from the feed to learn if the net wrap eaten earlier might get cleared out of the rumen and digestive system. It turns out that it was still in the rumen even after 14 days.

So, what should you do? First, remember that it doesn’t appear to be a health concern very often. And cows obviously are more at risk than feedlot animals. It might be wise to remove as much twine, especially plastic twine, as can be removed easily from bales before feeding.

Twine in ground hay may be less of a problem since more of it is likely to pass completely through the animal. Think about how shortcuts and work-reducing actions you take this winter and spring might affect your animals, then act accordingly.

Volesky is a Nebraska Extension forage specialist.

Source: Pasture and Forage Minute, which is solely responsible for the information provided by the source. Informa Business Media and all its subsidiaries are not responsible for any of the content contained in this information asset.
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