Efficacy of a Novel Herbal Dewormer on Katahdin Lambs

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Introduction: Most shepherds are familiar with the need to deworm their sheep and the added stresses that go along with it. Over time, the Barber Pole Worm and other economically devastating parasites have become more resistant to conventional dewormers, creating a quickly growing need for alternative deworming practices. An effective herbal dewormer could be a solution available to sheep farmers, especially those using organic practices. During the summer of 2022, for our senior capstone study at the University of Maine, we tested the novel herbal dewormer Early Bird to evaluate whether it was an effective option. Early Bird is a…

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A Tribute to Dr. Charles Parker, Mentor and Friend

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Dr. Charles Parker (1935-2024) was a sheep specialist, researcher, industry leader and experienced advisor to many of us in the Katahdin breed. As an early supporter of the breed, Charles felt that Katahdins could and should be the Complete Meat Sheep, genetically balanced for reproductive and growth efficiency and easily adapted to diverse production systems. Following his death in July 2024 we decided to compile some of his advice and guidance over the years to share with others. In collaboration with the Piel Farm, Heifer Project and some of the early Katahdin breeders, Charles was instrumental in the development of…

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Buying Parasite Resistance: considerations for greater success

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Often producers interested in adding genetics for parasite resistance to their flock are faced with deciphering the fecal egg count (FEC) EBVs listed on a stall card or catalog at an auction (online or in person). Is that enough information to identify a parasite resistant animal? In my experience, no. Estimated Breeding Values (EBVs) provide a wonderful tool to predict animal performance, but when it comes to parasite resistance, the stated EBV often doesn't provide the whole answer. More than other traits, FEC EBVs can be subject to some pretty big changes over time. Partly that's because there is such…

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Meningeal Worm

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Meningeal worm (Parelaphostrongylus tenuis), also known as deer worm or brain worm, is a parasite of white tail deer that typically causes disease in sheep in the late summer and fall. In deer, the adult P. tenuis worms live on the membranes covering their brains, the meninges. In most deer there is no adverse effect from the parasites. Female worms lay eggs on the meningeal membranes, they hatch, the larvae migrate into the bloodstream and travel to the lungs. Here larvae are coughed up and swallowed, passing through the intestinal tract and larvae are excreted with the deer manure. These…

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Grazing Native Warm-Season Grasses: SARE Grant Update

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In my career with USDA-NRCS I've been fortunate to see a lot of different production methods involving a variety of livestock operations across North Carolina. Beginning in 2016, I began working with more producers that had established or wanted to establish native warm-season grasses (NWSGs) in their pasture operations. Those producers mainly worked with beef cattle. These work experiences led me to want to do the same thing on our small 20-acre farm in North Carolina. However, I wanted to do something different by using sheep. Study Design My proposed theory was that I could use NWSGs to lower feed…

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Scours: Causes, Treatment, and Prevention

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Scours or diarrhea is something that most of us probably see in our flocks over the course of a year. Animals scour whenever there is a disturbance in the normal processes that regulate how much fluid is excreted in their manure. Scours is a symptom, sometimes due to a serious disease that requires prompt treatment, but often diet induced and transient, requiring only tincture of time to resolve. Diet plays a large role in manure consistency; expect looser manure for a few days whenever there is an increase in protein and/or energy or a decrease in fiber in their diets.…

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Profile: Dr. Scott Bowdridge

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This past summer, Dr. Scott Bowdridge, Associate Professor of Food Animal Production, West Virginia University, opened our minds to his exciting research identifying immune mechanisms in sheep to eliminate parasitic infections. At the 2022 Eastern Alliance for Production Katahdins (EAPK) symposium he discussed his data that links low FEC EBVs (Fecal Egg Count Estimated Breeding Values) with an overall increase in disease resistance. Dr. Bowdridge has diverse experiences working as a sheep producer, geneticist and now as an immunologist. Through the years, he has developed many relationships with other scientists in the field. Together their groundbreaking research is advancing the…

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Signs and Symptoms: What are your sheep trying to tell you?

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We've all experienced a sick sheep, or at least one that doesn't look quite right, but how do we distinguish a serious illness from one that is mild, or simply normal behavior? While your veterinarian should always be your primary source of medical advice, it's still important that shepherds have the ability to accurately identify and describe any signs and symptoms your animal may be experiencing. When calling your vet, this information will help him/her determine whether a farm visit is necessary or if a plan of care can be initiated by phone. It will also assist you in researching…

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How Does Selection for Parasite Resistance in Katahdin Sheep Affect Other Important Traits?

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Katahdin producers who use NSIP estimated breeding values (EBV) to make selection decisions on replacements for the home flock or for sale often select for more than one trait at a time. In fact, most breeders search for the perfect animal with balanced EBVs, or those that excel in all traits of interest. But what happens when two or more traits are used in selection? Can forward progress be made on both traits? Maybe. Parasite resistance has been selected for in several flocks with an estimated heritability of 0.19 for weaning fecal egg count (WFEC), and 0.24 for post-weaning fecal…

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Small Flock Pasture Management

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At weaning time, you will need your best pastures in tip top shape for your lambs to continue growing. Your free input resource must be managed throughout the late spring and summer. This can be challenging with limited equipment and modest grazing space. Rotational grazing techniques are helpful and can be complimented with proactive management. Early in the warmer seasons, cool season grasses and forbs are dominant and provide great forage. As the temperatures climb, the availability of palatable grasses and plants decline. Grasses can go to seed too quickly to graze your animals on them. Rain followed by hot daytime temperatures cause the grasses…

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