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The Katahdin Sheep Blog

The Katahdin Sheep Blog
USDA Sheep Auction Report
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Archives

Ruminations on Lambing Season – Updated 2025

Eastern Alliance December 11, 2025

There are a lot of preventable problems that can arise during lambing season, derailing the health and productivity of your ewes and lamb crop. Below

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Genotype Sampling Strategies: Why Pedigree Still Matters in the Genomic Era

Eastern Alliance November 23, 2025

Sheep GEMS News Brief 18 – September 2025 In last month’s news brief, we explored how genotyping strategies influence the accuracy of genomic predictions. That

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Genotype Sampling Strategies: Choosing Who to Genotype

Eastern Alliance November 23, 2025

Sheep GEMS News Brief 17 – August 2025 Genomic selection is becoming an increasingly important tool for improving sheep genetics. By using DNA (genomic) information,

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Let’s Make a Grazing Chart Together (Part 1)

Eastern Alliance November 9, 2025

I hope you enjoyed Troy Bishop’s EAPK monthly webinar on Grazing and Forage Planning. Don’t worry if you missed it, a recording is available at

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Two Brothers: A Journey Through Changing EBVs

Eastern Alliance October 5, 2025

Let’s go on a journey with two Katahdin full sibling ram lambs and follow them as their EBVs change when their own performance is measured.

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Selecting the Optimal Sheep for Solar Grazing

Eastern Alliance September 12, 2025

While this article focuses on solar grazing, the principles discussed are relevant to all low-input, grass-based production systems. This article was originally published in the

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Producer Profile: Daniel Ulry, Ulry Farms, OH

Eastern Alliance September 2, 2025

Growing up in 4H, Daniel Ulry is a shepherd who has dabbled in many areas of the sheep industry. His experience spans three decades and

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Why you should NOT use lye as a dewormer

Eastern Alliance August 26, 2025

There’s been some talk lately on social media about using lye to deworm livestock and you may be wondering if it works. As with so

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The potential of genomic selection for improving ewe longevity

Eastern Alliance August 18, 2025

Sheep GEMS News Brief 16 – July 2025 In a previous article, we highlighted the need for genetically improving the length of ewe productive life

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Is the length of productive life a concern in the U.S. Katahdin ewes?

Eastern Alliance August 18, 2025

Sheep GEMS News Brief 15 – June 2025 Ewe productive longevity, which is the number of days between a ewe’s first and last lambing, positively

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Lambing Due-Date Calculator:
Enter Date of Breeding:
(MM/DD/YYYY format)
Expected Lambing Date:
Range of Lambing Dates:

Gestation in sheep varies from 142 to 152 days with the average being 147 days. Just like people, individual pregnancies can vary,  gestation periods of 138 to 159 days are not unheard of. Ewes carrying multiple lambs tend to have shorter gestations while male lambs (and heavy birth weight lambs) are usually carried for longer than female lambs. The form above calculates the lambing date based on a 147 day gestation period.

© All rights reserved Eastern Alliance for Production Katahdins, images property of EAPK can’t be used without permission. Information provided is for information only and is the opinion of the author. EAPK tries to regularly update and add information to the web site, but makes no warranties (express or implied) about the information on the web site. It is the user’s responsibility to evaluate the accuracy and completeness of any content appearing on the web site.

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