The Nuts and Bolts of EBVs

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EBVs are tools that producers can use to select breeding animals that will help them meet flock goals for specific traits such as growth, milk, reproduction, parasite resistance and carcass quality. It is important to understand that selecting for extremes in one trait will often put negative selection pressure on other traits of interest. Often, animals with extremely high EBVs in certain traits will require additional nutritional support or better management to perform…

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Producer Profile: Alex Caskey from Barred Owl Brook Farm, NY

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As producers we cannot control the weather, but we can build resilience into our farm systems to mediate its effects. Silvopasture - the intentional integration of trees and grazing livestock - has been a hot topic of agricultural webinars because growing trees can do just that. Alex Caskey combines his education in conservation biology with his love of lamb chops. His Katahdin sheep graze the trees along with the pasture grasses and then…

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Winter Grazing for Livestock: Enhancing Animal Performance, Health, and Farm Profitability

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Winter grazing for livestock offers numerous benefits that extend beyond traditional feeding practices. This article explores the advantages of winter grazing, including improved animal performance, enhanced animal health, reduced labor for farmers, and ultimately, improved profitability. Improved Animal Performance: Winter grazing allows animals to continue their natural behaviors which limits exposure to mud and pathogens that often occur at hay feeding stations. Research by Johnson et al. (2018, "Effects of Winter Grazing System…

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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…

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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…

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Plant Toxicity in Sheep

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Like many sheep articles, personal experience was the inspiration for this one. And like most sheep problems, the exact cause isn't certain, but the pattern of symptoms - photosensitivity and the sudden death of a few 7-month-old ram lambs - led to a suspected diagnosis of plant toxicity and photosensitivity exacerbated by a brutally hot summer. Photosensitization is an inflammation of the skin and is caused by either primary sources (e.g., direct contact…

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Where to Buy Sheep

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We often get asked "Where's the best place to buy sheep?" A lot depends on your goals and what you'll use the sheep for, but one thing is pretty much certain: Don't buy sheep from the local sale barn. Below are some of the more common sale venues with some of the pros and cons listed. Venue Pros Cons On Farm Often lowest cost option Least chance of biosecurity issues Least stress for…

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Evaluating your mineral program

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We all know that our sheep need minerals, but how do we know that we are not over- or under-supplying their needs? Mineral deficiencies can lead to disease, but too much can lead to toxicity and even death. Minerals interact with each other; high levels of molybdenum can suppress copper levels and cause copper deficiency but it is also used to protect against copper toxicity in instances where high copper levels are present.…

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Understanding “Number of Lambs Weaned” (NLW) Estimated Breeding Values

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We've been members of NSIP since 2006 and I must confess that I've never really understood what all went into the calculation of "Number of Lambs Weaned", let alone Genomically-enhanced Estimated Breeding Values (GEBV) for NLW. Seems most of my ewes had NLW GEBV that were about the same as their NLB GEBV, with a few exceptions. Some were a little lower and some were a little higher, and since they are correlated,…

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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…

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