Pregnancy Diagnosis

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There are various options for diagnosing pregnancy in sheep. The cost/benefit analysis for doing this procedure depends on what you are going to do with the information. Your reasons for doing pregnancy diagnosis will also dictate which method you want to employ. In general, the earlier in pregnancy the diagnosis is made, the larger the risk of false positive results due to early embryonic loss. If avoiding false positive pregnancy diagnosis is essential to your production, it might be better to postpone diagnostic testing so ewes are closer to 60 days pregnant before testing. Available diagnostic tests: Blood tests: Pregnancy…

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EAPK Producer Profile – Beckie Hotz, Mariposa Farm

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My introduction to agriculture was through plants. I studied biology in college with a broad view of both animals and plants. Toward the end of college, I focused on the plant side of agriculture, specifically at the soil level. All these years later, I find this helps me stay focused on the value of pasture management.  After college, I taught outdoor experiential education for youth and led group treks in the mountains. Soon after, I realized that I wanted to be more self-sufficient and learn to grow my own food. I interned on several CSA (community supported agriculture) and vegetable market…

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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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Selecting for Maternal Traits Drives Profit

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Katahdins are raised in diverse environments using a wide range of management styles and for a variety of reasons. However, there should be a few common goals in any flock. In addition to being a shedding hair breed, Katahdins have always been viewed as an easy keeping maternal breed. In recent years, many breeders have also begun selecting for parasite resistance to make the breed even more easy keeping. We know that the number one predictor of profitability in a ewe flock is the "Pounds of Lamb Weaned per Ewe Exposed." This metric combines several maternal traits. This article will…

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Transporting Sheep Safely

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Summer is often the busiest time for transporting sheep since the buying and purchasing of new animals is at its peak. It is also the season for hauling animals to sales, shows, fairgrounds and livestock markets. Unfortunately, it can also be the most stressful time for animals with long trips, escalating temperatures, and crowded conditions. This article attempts to address some of those concerns and provide a plan for preparing for the trip, ways to reduce stress and keep animals healthy during transport, and how to handle new arrivals to maintain biosecurity on your farm. First and foremost, do not…

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Selecting Your Next Breeding Ram

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Achieving genetic progress and meeting your production goals depend in large part on selecting the right breeding ram for your flock. No animal has greater influence on genetic progress (or lack thereof) than your breeding ram. Selecting a new sire should be considered an investment in the genetic future of your flock. We all know that the ram provides 50% of his genetics to his offspring and we often hear the phrase that "your ram is half your flock", so careful selection is important. For many breeders it all starts with the phenotype. That is, the physical appearance of the…

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Selecting for Parasite Resistant Katahdins

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People frequently ask us for suggestions on improving the parasite resistance of their flocks and how to identify resistant animals, and with good reason. Intestinal worms, or parasites, are one of the most limiting factors to profitable production for shepherds raising sheep on pasture. Lambs and late gestation and lactating ewes are the most susceptible. The main parasite of concern in much of the U.S. is Haemonchus contortus or barber pole worm. The most obvious cost to producers is through deaths of lambs and ewes. But probably more loss occurs in lambs because of anemia, reduced appetite, slower growth, delays…

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Drug Withdrawal Times for Sheep

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Whenever we sell animals, be it at auction, privately as feeder lambs, breeding stock or even just pets and lawnmowers it is our responsibility to make sure that the animals we are selling will not enter the food chain with illegal drug residues in their tissue. Animals that are sold at auction need to be ready to slaughter as many enter the food chain within hours or days after being sold. Private sale feeder lambs, pets and breeding stock animals can be sold before their drug withdrawal times are over as long as you tell the buyer and they are…

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Weaning Management

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Weaning can be a stressful time for both ewes and lambs. Since a lamb's immune system is not fully developed, weaning stress can negatively affect both a lamb's health and its growth rate. Weaning lambs while ewes are still producing a lot of milk increases the risk of mastitis. There are several ways you can help reduce weaning stress and other potential problems for both ewes and lambs. Determining when to wean should be based on age of the lambs, body condition of the ewes, available. resources, and management considerations. Most shepherds wean between 60-120 days of age depending on…

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Polio in Sheep: A Medical Emergency

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Polioencephalomalacia (PEM or Polio) is a common disease in sheep. Unlike the human form of Polio, it is not a viral infection, but a neurological disease characterized by brain swelling that, if left untreated, progresses to degeneration of brain tissue due to pressure necrosis. Early treatment is critical to lamb survival. A deficiency in thiamine (vitamin B1) is the most common cause of Polio and is usually induced by a disruption in normal rumen function, especially acidosis. Thiamine plays a key role in glucose metabolism and proper brain function. Since thiamine is produced from rumen microbes, lambs at greatest risk…

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