Research

Effects of Dietary Fat in Lamb Feeding Diets

Brady Campbell, Program Coordinator, OSU Sheep Team

If you recall from an article published earlier this month, Dr. Relling and his lab investigated the effects of supplementing fat to gestating ewes. Dr. Relling’s lab compared the supplementation of saturated and monounsaturated fatty acids (MUFA’s – calcium salts of palm oil) to polyunsaturated fatty acids (PUFA’s – eicosapentaenoic and docosahexaenoic acids) on the performance of lambs who’s dam were fed these fatty acids. Through their experiments, Dr. Relling’s lab demonstrated that lambs reared from ewes supplemented with PUFA’s had greater weight gains and therefore a greater economical value when compared to lambs reared from ewes supplemented with MUFA’s.

In taking these points into consideration, producers may Continue reading →

Ewe Winter Feeding Systems, the Long Term Effects on Lamb Performance

Brady Campbell, Program Coordinator, OSU Sheep Team

As we approach the winter months, I find it timely to discuss what types of feedstuffs are available to feed gestating ewes. Last fall I published a summary from Radunz and others (2011) that covered the effects of winter feeding systems on ewe performance which can be found by clicking this link. For those not able to access the link, three different diets were fed to gestating ewes during the last 90 days of gestation which consisted of either forage (haylage), grain (limit fed corn), or by-products (limit fed dried distillers grains). After birth, all ewes were fed the same lactation diet.

From an economic perspective, feeding by-products proved to be roughly $0.01/head/day cheaper than Continue reading →

Feeding Strategies to Increase Lamb Performance, Carcass Characteristics, and Consumer Acceptability

Brady Campbell, Program Coordinator, OSU Sheep Team

For most producers, maintaining high standards
of animal welfare and increasing production efficiencies rank among the most important factors involved in livestock production. While focusing on production efficiencies, what can producers do in order to help make their livestock more efficient? We know that excess fat on the carcass of an animal is considered inefficient as excess fat will be trimmed off, disposed of during the fabrication process, and does not contribute to final lean yield. In the case of lamb, excess fat can be a challenge as fat is associated with flavor and in turn the overall acceptability of the product. In order to produce a product that is acceptable for consumers from both a flavor and palatability standpoint, producers have access to different management strategies that can be implemented in order to change the performance and carcass characteristics of fed lambs. In order to determine Continue reading →

Adding Distillers Grain and Soy Hulls to Sheep Diets

Jeff Held, SDSU Sheep Extension Specialists
(Previously published as an Extension Extra: South Dakota State University Cooperative Extension Service)

Feeding Soy Hulls and Dried Distillers Grain with Solubles to Sheep

Co-products from corn and soybean processing industries can be excellent sources of nutrients for livestock. With the growth of ethanol production from corn and increasing number of soybeans processed in the Upper Midwest, livestock producers have many nutrient-dense co-product feed resources readily available. In the Upper Midwest distillers dried grain with solubles (DDGS) derived from ethanol production and soybean hulls (SH) from soybean processing have created the greatest interest to sheep producers.

Interestingly these co-products are both high fiber-low starch in content, much like forages. Yet DDGS is classified as a protein feed and SH could be classified as an energy feedstuff.

As often found with co-product feed ingredients, these have unique nutrient profiles and physical characteristics that require attention when formulating diets. They often can serve multiple roles in diet formulation: Continue reading →

Energy Intake and Protein Concentration Effects Lamb Performance and Visceral Organ Mass

Brady Campbell, Program Coordinator, OSU Sheep Team

As summer approaches, I can’t help but to think about the upcoming breeding sheep show season, when will Mother Nature let us to make our first cutting of hay in southeastern Ohio, and the number of lambs that are on feed in the state of Ohio. For those producers that are feeding out lambs, I have a few management questions to ask. Currently, how are you feeding your lambs? Are your lamb’s offered ad libitum access to feed all day or are you feeding your group of lambs at a specific rate (i.e. percent of body weight)? When formulating your rations, how are you determining the percent protein needed in your lamb diets? Are you feeding Continue reading →

The Effects of Finishing Diet and Weight on Lamb Performance, Carcass Characteristics, and Flavor

Brady Campbell, Program Coordinator, OSU Sheep Team

The beauty of the small ruminant industry is that producers are able to capitalize on niche markets that surround religious holidays. Unfortunately, it is clear that the price of lambs at the sale barn has dropped as seen in recent market reports, with the conclusion of Christian and Orthodox Easter’s as well as Passover. Checking the calendar, it appears that we are approaching both Ramadan (month of fasting beginning May 6) and Eid al-Fitr (June 5-7). The occurrence of these religious holidays may allow for the lamb market to see an increase in market prices, but many fall and winter born lambs in the eastern US will also be entering the market as they approach finishing weights and in turn may flood the market. Therefore, as a producer, it is important to have a marketing plan in mind when making breeding decisions for proper lambing dates.

Aside from religious holidays, lamb Continue reading →

Management Practices that can Affect the Flavor Intensity of Lamb

Jerad Jaborek, Graduate Research Associate, The Ohio State University

Now is the time of year when the majority of winter lambs are being weaned. After weaning, these lambs will be sold at the sale barn

or retained on the farm to be placed on feed to reach market ready weights. Have you ever considered that the way we manage these lambs will affect the flavor intensity of the sheep meat produced from these lambs?

According to 2015 National Lamb Quality Audit, which conducted surveys with people working in the lamb supply chain (retailers, food service, and purveyors) to rank the importance of quality attributes. Eating satisfaction was the most important attribute to survey participants and was commonly defined as the Continue reading →

How can Delayed Weaning Benefit your Operation?

Brady Campbell, Program Coordinator, OSU Sheep Team

At what age do you wean your lambs? This is a question that I have asked producers many times. I have heard ages ranging from 35-130 days of age with the most common answer being 60 days of age. This is the most common weaning age for producers in the eastern United States. When I ask producers why they wean their lambs at 60 days of age or younger, most respond with “that’s the way we have always done it here on the farm, so why change now?”

From a researcher’s perspective, this is not a valid answer. Weaning before the natural weaning age (between 100-180 days of age depending upon sheep breed) is stressful. Weaning stress can lead to decreases in animal performance as demonstrated by decreased weight gain. Weaning stress can also result in decreased animal health as shown by decreases in immune system function that can lead to an increased susceptibility to disease and infection. However, if we were Continue reading →

How do Finishing Diet Combinations Affect Lamb Performance and Tissue Growth?

Brady Campbell, Program Coordinator, OSU Sheep Team

For those shepherds in the state of Ohio that retain their lambs and finish to a market weight, a high concentrate finishing diet is commonly used. High concentrate diets are favored by producers as these types of diets allow producers to raise their lambs indoors away from predators, at a low cost when grain prices are low, and allow their lambs to reach a market ready weight at an earlier time point when compared to forage fed lambs. However, in today’s market, the production of grass-fed meat products receives a premium. Therefore, in order to capitalize on these premiums, some producers may choose to produce grass fed or pasture raised lamb.

When switching to alternative backgrounding and finishing diets, it is important to understand Continue reading →

What Finishing Diet Should I Feed my Lambs?

Brady Campbell, Program Coordinator, OSU Sheep Team

Do lambs perform and hang better carcasses when grazed on grasses, legumes, or fed an all concentrate diet?

Before to asking these questions, producers must first determine the goal of their operation. Resources such as land, labor, time, and money all play a critical role in the daily management of an operation. In today’s society, there are two types of consumers. Those that want access to quality protein sources at low prices, and those that are willing to pay a premium for specialty products (i.e. grass-fed lamb). When grain prices are low, it may be more economical for producers to finish lambs on grain. However, in order to reach a premium through specialty markets, producers may choose to finish their lambs on pasture. Regardless of which finishing strategy is chosen, producers need to understand both Continue reading →

De-worming Lactating Ewes May Contribute to the Development of Parasitic Resistance

Brady Campbell, Program Coordinator, OSU Sheep Team

Animal production losses associated with internal parasitic infection continues to be of great concern in the small ruminant industry. This is due to the development of parasitic resistance to chemical de-worming products.

For example, when a de-wormer is given at a lower dose than what is recommended on the manufactures label, the parasite in the treated animal may not receive an effective or lethal dose. A concern with treating lactating ewes is that Continue reading →

Winter Feeding Systems, Which is the Best for You?

Brady Campbell, Program Coordinator, OSU Sheep Team

The effects of winter feeding systems in gestating sheep on ewe and lamb pre-weaning performance.

As the breeding season comes to an end and winter approaches, it is important to consider how pregnant ewes will be managed as lambing season approaches.

There are several options available to producers for winter feeding strategies such as stockpiling forages on pasture, stored hay, grains, and recently the use of byproducts. Winter feeding can be a challenge as providing enough energy to meet the maintenance requirement of the gestating ewe and growth of the fetus becomes difficult.

Image Source: University of Kentucky, College of Agriculture, Department of Animal Sciences

In order to determine the effects of Continue reading →

How Does Harvest Weight and Diet Affect Carcass Characteristics?

Brady Campbell, Program Coordinator, OSU Sheep Team

The most common method for finishing lambs in the United States is the use of a high concentrate diet. Although high concentrate diets allow for lambs to be finished at a younger age, one down fall of this feeding strategy is that lambs may to accumulate an excessive amount of carcass fat. An alternative method to finish lambs would be the use of pasture. Forage fed lambs develop less carcass fat, but require a longer period of time to finish and are harvested at an older age when compared to concentrate fed lambs. In order to determine which feeding strategy will yield the greatest amount of marketable product, a comparison of light and heavy weight lambs on two different diets has been summarized.

In order to make this comparison, lambs were harvested Continue reading →

What Benefits are Gained by Processing Grain Fed to Sheep?

Brady Campbell, Program Coordinator, OSU Sheep Team

How does corn processing and fiber source affect feedlot lamb performance, diet digestibility, nitrogen metabolism?

(Image source: Maine Organic Farmers and Gardeners Association)

Behaviorally, sheep and cattle are very different, especially in the way they eat. Sheep are more selective in their eating pattern and spend more time physically chewing and breaking down their feed than cattle do.

Regardless of the animal we are feeding, it is common practice in the livestock feed industry to process the grains fed to our animals. An issue with feeding processed grain is that due to an increase in surface area, the starches in grain become more readily available for the animal to digest. As a result, an increase in digestion may lead to metabolic issues such as acidosis in our ruminant species.

Therefore, a question of interest that arises is can sheep be fed unprocessed grains without Continue reading →

What Flooring and Bedding Materials are You Using in Your Feedlot?

Brady Campbell, Program Coordinator, OSU Sheep Team

What effect does pen flooring type and bedding have on the performance of finishing lambs?

A common management practice used to finish lambs is to house and feed lambs in an enclosed feedlot. Feedlots are used to protect the lambs from several environmental factors, predators, and parasites as well as ensuring the quality and amount of feed each lamb is receiving. Within the feedlot environment, variation in structural design and feedlot management is to be expected. As a producer, have you ever considered Continue reading →

The Future of Finishing Lambs

Brady Campbell, Program Coordinator, OSU Sheep Team

Can the implementation of growth promotants or forage grazed finishing diets increase lean muscle gain in lambs without increasing carcass fat?

Marketing lambs at a high lean to fat carcass ratio is important in producing consistent and quality retail lamb products.

Lambs fed high concentrate diets finish at a younger age when compared to forage fed lambs. However, lambs fed high concentrate diets accumulate more carcass fat than lambs on grazed forage diets. The use of either growth promotants or forage finishing diets may provide producers with Continue reading →