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Agricultural News


OSU's Glenn Selk Offers his Advice on When to Intervene and Assist a Cow or Heifer in Labor

Tue, 20 Aug 2019 17:45:39 CDT

OSU's Glenn Selk Offers his Advice on When to Intervene and Assist a Cow or Heifer in Labor Dr. Glenn Selk, Oklahoma State University Emeritus Extension Animal Scientist, offers herd health advice as part of the weekly series known as the "Cow Calf Corner" published electronically by Dr. Peel and Dr. Glenn Selk. Today, Dr. Selk offers tips on how to know when to intervene and assist a cow or heifer in labor.


"As the fall calving season commences, now is the time to put together and post a protocol for family members and hired employees to follow when they find a cow or heifer starting in the process of calving. An issue facing the rancher at calving time, is the amount of time heifers or cows are allowed to be in labor before assistance is given. Formerly, traditional text books, fact sheets and magazine articles stated that “Stage II” of labor lasted from 2 to 4 hours. “Stage II” is defined as that portion of the birthing process from the first appearance of the water bag until the baby calf is delivered. Research data from Oklahoma State University and the USDA experiment station at Miles City, Montana clearly show that Stage II is much shorter, lasting approximately 60 minutes in first calf heifers, and 30 minutes or less in mature cows.


To view the table or chart referenced in this article click or tap here to jump to the original article.


"In these studies, heifers that were in stage II of labor much more than one hour or cows that were in stage II much more than 30 minutes definitely needed assistance. Research information also shows that calves from prolonged deliveries are weaker and more disease prone, even if born alive. In addition, cows or heifers with prolonged deliveries return to heat later and are less likely to be bred for the next calf crop. Consequently a good rule of thumb: “If the heifer is not making significant progress 1 hour after the water bag or feet appear, examine the heifer to see if you can provide assistance. Mature cows should be watched for only 30 minutes before a rectal examine is conducted.” Make certain the cervix is completely dilated before pulling on the chains. If you cannot safely deliver the calf yourself at this time, call your local large animal veterinarian immediately.


"Most ranches develop heifers fully, and use calving ease bulls to prevent calving difficulties. However, a few difficult births are going to occur each calving season. Giving assistance in a timely manner will save a few more calves, and result in healthier more productive two-year old cows to rebreed next year.   Learn more about working with cows and first calf heifers at calving time by downloading and reading “Calving Time Management for Beef Cows and Heifers” Oklahoma Cooperative Extension Circular E-1006."


   

 

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