Tuesday, November 29, 2022
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Wean Early to Prep Thin Cows for Winter Weather

Thanks to TL Meyer, Nebraska Extension Beef Educator, and Travis Mulliniks, UNL Beef Cattle Nutritionist, Range Production Systems, for this article.
Listen to a discussion of the content in this article on this episode of the BeefWatch podcast. You can subscribe to new episodes in iTunes or paste http://feeds.feedburner.com/unlbeefwatch into your podcast app.

If you have cows that are thinner than normal, consider weaning earlier to give those cows a chance to gain body condition, and hold it through the winter. This is especially true for younger females.

Data from the Gudmundsen Sandhills Laboratory Practicum teaching herd illustrates how the time of weaning affects cow Body Condition Score (BCS) over the winter and into the next summer. (See the graph below.) By weaning in September, cows maintained almost an entire BCS greater than weaning in October. This can be especially important if we have a wet and cold winter like 2018-2019. If it gets cold enough, there may be times producers cannot feed enough to give cows the energy needed to withstand the cold. In periods like this, cows lose body condition to offset an energy-deficient diet. Body condition scoring is an effective management tool to estimate the energy reserves of a cow, and in essence, cows with a BCS of 5 or greater going into the winter are an insurance policy or risk management tool.

In some years, forage quality, weather conditions, and time of weaning, can make putting body condition on cows more difficult. Last year, in many parts of Nebraska, high amounts of early rainfall caused tremendous forage growth. By July, that forage quality had declined and was similar to September/October forage quality. As normal weaning time occurred in 2018 for many producers, cows tended to be thinner on average. This was coupled with the increased maintenance energy requirements during the winter due to the cold stress, which left cows calving in less than optimum BCS.

Considering your forage growth and weather is always helpful when it comes to choosing a weaning date. As an example of this, for those of us in Nebraska this year, saying we have had above average rainfall is an understatement. Although forage growth came on late due to cooler temperatures, native range quality is sitting close to average in the Sandhills. Unfortunately, the extra precipitation has challenged hay production for many beef producers. In spite of adequate range quality, the potentially decreased hay production is an additional reason to monitor cow BCS to decide a weaning date.

We hope this helps you think about ways you can help your cows maintain good body condition economically.

Photo by Troy Walz

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Kathy Voth
Kathy Vothhttps://onpasture.com
I am the founder, editor and publisher of On Pasture, now retired. My career spanned 40 years of finding creative solutions to problems, and sharing ideas with people that encouraged them to work together and try new things. From figuring out how to teach livestock to eat weeds, to teaching range management to high schoolers, outdoor ed graduation camping trips with fifty 6th graders at a time, building firebreaks with a 130-goat herd, developing the signs and interpretation for the Storm King Fourteen Memorial trail, receiving the Conservation Service Award for my work building the 150-mile mountain bike trail from Grand Junction, Colorado to Moab, Utah...well, the list is long so I'll stop with, I've had a great time and I'm very grateful.

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