Sheep GEMS Update

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Sheep GEMS is roaring ahead, with the strong commitment by Katahdin breeders particularly welcomed. With the help of John Bare, Michelle Canfield, Tom Hodgman, and Jim Morgan—members of a Project Advisory Group—twenty-six Katahdin flocks have voiced their interest to participate in this project. A key element of Sheep GEMS is collecting performance records in NSIP-member flocks that reflect the productive efficiency, robustness, and climatic resilience of their sheep. These include udder health, lamb survival, ewe longevity, and parasite resistance. Based on the outcome of a pilot study underway, we also are developing a measure of coat shedding in Katahdins that…

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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 Farm Ram Management Options

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Breeding season is here and if you want to add lambs to your flock next year you are going to need a ram. Timing your lambing to suit your schedule requires you to keep a ram separate until you're ready to introduce him to your ewes. Keep in mind, rams of different ages have different feed requirements for maintenance and must be housed with companions as they too, need a 'flock' to keep stress low and maintain a calm disposition. Keeping rams and ewes separate requires maintaining two different groups most of the year. A little creativity may be necessary…

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Shepherd to Shepherd: Producer Forum Blog #3

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For our third producer forum we asked our four shepherds, all enrolled in NSIP, how they select their breeding rams and how they make breeding decisions on their farms. Their answers, shared below, reflect the differences among the farms in environment, markets, individual flock goals and management styles. As a reminder, our producer forum includes: Michelle Canfield (Canfield Farms, Western Washington), Lynn Fahrmeier (Fahrmeier Katahdins, Western Missouri), Roxanne Newton (Hound River Farm, South Georgia), and Etienne and Isabel Richards (Gibraltar Farm, Central NY) What traits do you look for when selecting a breeding ram? Canfield: I always seek a ram…

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Ovine Progressive Pneumonia (OPP)

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Most shepherds have probably heard of OPP as it is one of the three diseases included in the biosecurity panels that many laboratories offer. The USDA Sheep 2001 study tested over 21,000 samples from 682 randomly selected flocks country wide to collect data on the prevalence of OPP. They found that 36.4% of flocks had one or more animals that tested positive and overall, 24.2% of the animals tested were positive for OPP. Only 1.2% of the producers suspected that their animals were infected with OPP. This data is from over 20 years ago but still relevant as it shows…

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Shepherd to Shepherd: Producer Forum #2

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For our second producer forum we asked our four shepherds what data they collect besides that used for NSIP; how they manage their data; what software programs they use; and how they analyze and use their data to make selection decisions.  Michelle Canfield, Canfield Farms, Western Washington I use Ranch Manager for my day-to-day husbandry records. Mostly what I keep in here are records of medical treatments & other events; location of sheep (pasture vs barn); breeding & lambing records; and purchase & sale records. It supports functionality to track weights and financial data, but I don't use those features,…

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Udder Health in Ewes: Mastitis, Udder Scores and Management

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Ewes only have two teats and hopefully raise at least twin lambs, so maintaining healthy udders and culling ewes with udder problems is important to minimize lamb losses and bottle lambs while ensuring optimal growth of lambs on your farm. Mastitis leads to lower weaning weights in lambs of affected dams, takes time and money for treatment, as well as slowing down genetic progress due to forced culling of ewes. Rates of mastitis are variable across different farms. It is important to keep track of the percentage of ewes that get mastitis each year or are culled for lumpy udders…

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Shepherd to Shepherd: Introducing our NEW Producer Forum

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Sharing experiences is the hallmark of education. In this new producer forum, four experienced EAPK members enrolled in NSIP, from very diverse areas of the U.S., answer questions and share their knowledge and insights into shepherding. In a series of interviews, Lynn Fahrmeier (Fahrmeier Katahdins, Western Missouri), Michelle Canfield (Canfield Farms, Western Washington), Roxanne Newton (Hound River Farm, South Georgia), and Etienne and Isabel Richards (Gibraltar Farm, Central NY) describe their operations, unique challenges and what traits and qualities best fit their goals, management system and environment. The interviews will continue throughout the year with additional questions. In 2023, a new…

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Prolapses in Sheep

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There are three structures that can prolapse and be visible under a ewe's tail: vagina, uterus and rectum. Vaginal and uterine prolapses can affect ewes around lambing and will be discussed here. Vaginal Prolapse A vaginal prolapse occurs when a ewe's vagina protrudes out of her vulva. Most prolapses occur in the last few days or weeks of pregnancy. It usually starts with the ewe laying down and you just see a small little ball of red tissue protruding from the vulva that retracts when she stands up. This is the ideal time to start treatment and prevent it from…

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Making Genetic Progress

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As breeders of purebred livestock, attention to genetic progress should be at the forefront of our selection programs. The equation below summarizes the components that contribute to genetic progress. indicates change in genetics ( stands for change, G stands for genetics). Genetic progress can be improved by increasing those components in the numerator (Accuracy, Selection Intensity, and Genetic Variation) and decreasing those traits in the denominator (Generation Interval). Each component is described in greater detail below. Accuracy: Accuracy values represent the relationship between the "estimated" breeding value and "true" breeding value. Increased accuracy results from greater records in the evaluation…

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