- Author: Dan Macon
While Leptospirosis is a bacterial infection that can occurs worldwide, it is more common in tropical and sub-tropical areas. For example, Leptospirosis is a relatively frequent disease in Mexico. In California, Leptospirosis is an emergent disease, which could be explained (at least in part) by our changing climate. Leptospirosis is caused by spiral-shaped bacteria that can cause damage to the liver, kidneys, and other organs of animals and humans. Cases usually occur in the summer and fall; large outbreaks have occurred after flooding. Leptospirosis is not spread from person to person, but from animals to humans through the urine of infected animals, which gets into soil or water. Humans and animals can become infected through direct contact with this contaminated soil or water, where the bacteria can survive for some months. The bacteria can also enter through cuts in the skin, through the mucous membranes or through drinking water.
In cattle, sheep, goats and swine, symptoms of Leptospirosis may include fever and reproductive problems (e.g., abortions). In humans, symptoms can range from mild to severe (including flu-like illness, weakness, vomiting, mental confusion, jaundice, and stiff neck). Most people who become infected have no symptoms or may confuse their symptoms with a simple cold. Unfortunately, some people may develop more significant problems from Leptospirosis.
Vaccines are currently available for livestock and dogs – these vaccines can help prevent disease severity but may not complete prevent infection. We can protect our own health by preventing and controlling infection in our livestock. In addition, rodents can be a reservoir of the disease, so rodent control is important. Don't handle urine, blood, or tissues from infected animals – wear protective clothing, especially gloves! And always wash up after handling animals!
As you might imagine, Leptospirosis is primarily an occupational disease in humans – in other words, those of us who work directly with animals, contaminated soil, or stagnant water can be at greater risk. Half of California cattle herds have been estimated to be infected with Leptospira, which can be a serious threat to livestock producers and ranch employees. Active epidemiological surveillance has been repeatedly recommended, but surprisingly, no studies on Leptospirosis have been conducted in California agriculture workers. As a result, the Center for Health and the Environment at UC Davis is studying the prevalence of the disease in farmers and ranchers, farm workers, and veterinarians. This study will help researchers better understand the main exposure factors. The Center is looking for volunteers to participate in the study.
You can participate if you are:
- At least 18 years old;
- A rancher, ranch worker, or veterinarian; or
- Working in agriculture, or in close contact with livestock.
You must not have been sick during the last five weeks.
If you decide to participate in the study, researchers will ask some questions about your occupation and work history. You will also be asked to provide a blood sample. The questionnaire and the blood draw will take about 30 minutes. After you have answered the questions and a professional has taken your blood sample in a health facility, you will receive $60 in compensation. The survey and blood collection are completely anonymous.
If you are interested in participating or want more information (in English or Spanish), contact:
Center for Health and the Environment – UC Davis
Alvaro Medel
(530) 761-6380
- Author: Dan Macon
Bud Williams, in many respects, was the leading expert on livestock handling and stockmanship on the planet. I never had the opportunity to meet Bud personally, but I have learned from several people who learned directly from him - notably Roger Ingram (my predecessor as livestock advisor) and from Steve Cote, who teaches and writes about Bud's techniques today.
Roger had the opportunity to work directly with Bud at a cattle feedlot in Canada in 1993, an experience he writes about in Belief and the Will To Do It. Low-stress stockmanship, Roger writes, requires a change in attitude:
Old Attitude: "I'm going to MAKE that animal do what I want."
New Attitude: "I'm going to LET that animal do what I want."
Old Attitude: "That miserable [fill in your own profanity] cow [or sheep, goat, etc.] broke back [missed the gate, charged me, got sick, etc.].
New Attitude: "What did I do to cause the animal to react that way?"
Steve Cote, in his first book, Stockmanship: A Powerful Tool for Grazing Lands Management, writes:
"The best handlers have the best attitudes. They watch, adjust, and constantly move to where the stock show them the need to be to get the job done right, all the time."
As I've worked my own sheep, and helped other producers handle cattle, sheep and goats, I've realized that low stress stockmanship is a continual learning process. The key, for me, is that I believe in it - I've seen the results when it works well! When something doesn't work, though, I don't abandon my belief in the approach; rather, I think about what I could have done differently. Thoughtful stockmanship requires us to assume that if the animals aren't doing what we expect or desire that they are trying to communicate with us (rather than misbehaving).
This idea that stockmanship is a lifelong learning process, at least for me, is what separates Bud Williams from Temple Grandin. Dr. Grandin's facility designs are excellent, but in many ways they are designed to minimize stress on livestock when the handlers using the system are not students of stockmanship. Bud Williams' designs, on the other hand, work amazingly well because they are based on the principle that the handlers understand livestock behavior. The "Bud Box," which we use in our sheep corrals, is a great example of this principle.
Bud taught that animals will follow certain instinctive behaviors if they are in a normal mental state. Animals want to move in the direction they are headed; they also instinctively prefer to exit a pen where they entered it. They want to follow other animals (in other words, movement creates more movement when working with a herd or flock). They want to see what is pressuring them. If we want them to speed up, we can walk in the opposite direction of their movement; walking in the same direction as the animals will slow them down.
The Bud Box system takes advantage of these behaviors. Unlike the solid-sided, curved alleys and sorting "tubs" typical of many of the Dr. Grandin-designed facilities I've seen, the Bud Box is simple, open-sided, and straight. The Bud Box itself is a smallish pen at the head of the alley (for our sheep corrals, this pen is 8 feet by 10 feet - big enough for 8-10 ewes). The direction of movement into the alley is back towards the location where the animals entered the corrals (so they naturally want to return there). The opening at the head of the alley allows the animals to move away from the pressure of the handler working in the Bud Box - this handler simply walks from the opening diagonally through the Bud Box, which induces the animals to move away (and into the alley) in a calm manner. From there, a handler can walk with purpose in the opposite direction of the animal flow through the alley - this will induce the animals to move up the alley (towards a squeeze chute, or in our case, towards our sort gate). All of this can be done WITHOUT yelling, whistling, or using hot shots (or even rattle-paddles) to force the animals to go where we want them to go.
In our sheep operation, I've found that I can sort a group of sheep quickly working with just a dog. The dog helps load the Bud Box. The sheep are trained to the system - they will usually put themselves in the alley. While I stand at the sort gate at the end of the alley, the dog walks in the opposite direction of the sheep in the alley, which causes them to move forward (and through my sort gate).
Last month, we held a workshop on trimming feet and giving vaccinations to sheep. Using a drone, Roger was able to provide a bird's eye view of the Bud Box. This YouTube video shows us loading the alley, scanning ear tags, and sorting a wether into a holding pen.
Working animals rarely goes perfectly! Problems, at least when I'm in the proper frame of mind, are learning opportunities. Stockmanship requires cross-species communication (indeed, in the video above, there are sheep, dogs, and humans trying to communicate with one another). In my experience, time for reflection is also important - thinking about what worked (and what didn't) can make us better stock handlers!
- Author: Dan Macon
As anyone who has ever cared for livestock at a commercial scale will tell you, animal husbandry requires a wide range of skills. Ranchers must be animal behaviorists, veterinary technicians, bovine (or ovine, caprine, etc.) midwives, meteorologists, accountants, irrigators, carpenters, mechanics, marketing specialists….
Where have you learned to ranch? How long did it take you? Author Malcom Gladwell suggests that mastery of any skill requires an investment of at least 10,000 hours – that's five years of full time work (or maybe three years based on how many hours most ranchers work). My friend Jim Muck, who farms near Wheatland and manages the Student Farm at UC Davis, says, “Farmers and ranchers have to be generalists. We have to have the ability to see patterns and make decisions based on what we see, hear, feel, and touch. We use skills that cannot be taught in a classroom, but must be learned by doing and experiencing.”
Like Jim, I find that I learn best by doing - hands-on training, at least when it comes to ranching, is usually preferable to sitting in a classroom. I also find that I learn best from a combination of rancher-to-rancher sharing and expert instruction. This kind of learning, at least for me, provides a faster return on that 10,000-hour investment. Our Winter/Spring 2019 workshops offer this unique combination!
Date & Location | Topic & Description | ||
January 9 UCCE-Auburn $10/person |
Farmer-to-Farmer Breakfast: Revenue Protection and Whole Farm Insurance Get to know other farmers and ranchers in our area. Enjoy a chance to relax and talk with other agricultural producers about farming and ranching issues. We will have a presentation on whole farm revenue protection and other crop and livestock insurance options from Domenic Fino of Golden Pacific Crop Insurance. RSVP: https://ucanr.edu/survey/survey.cfm?surveynumber=26336 |
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January 17 UCCE-Auburn $5/person |
Shepherd Skills Workshop: Sheep Management Basics Join other new and aspiring shepherds for an evening workshop on general sheep husbandry, production calendars, sheep nutrition, and economic analysis. |
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January 19 Auburn $5/person |
Shepherd Skills Workshop: Preparing Ewes for Lambing Field Day This hands-on workshop will include information on vaccinating sheep, ewe management, ewe nutrition, and general husbandry topics. Rain or shine! |
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Jan 31 - Mar 7 (Thursday evenings) UCCE-Auburn $50/operation |
Farm/Ranch Business Planning Short Course Join other farmers and ranchers for a 6-week, 8-session short course covering farm economics, cash flow management, operations planning, risk management, and marketing strategies. The course is on Thursday nights (6-9 p.m.) from Jan. 31 to Mar. 7, plus Saturday, Feb. 9, and Saturday, Feb. 16. The course is limited to 8 operations. Apply at: http://ucanr.edu/farmbizplanning2019 |
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February 12 Loomis $10/person |
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March 2 Auburn $5/person |
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Be sure to check out my Livestock and Natural Resources website (https://ucanr.edu/sites/Livestock/) and the Foothill Farming website (https://ucanr.edu/sites/placernevadasmallfarms/) for up-to-date details about workshops and meetings!
/table>- Author: Dan Macon
As a grazer of sheep, at least from a forage management perspective, I live by the rule, "If the worst might happen, it probably will." A corollary to this rule is that pessimists are often pleasantly surprised. As a somewhat pessimistic rancher, I'm pleasantly surprised when we get fall rains and green grass before Halloween!
My pessimism manifests itself in a variety of ways. Like many ranchers, one of my go-to drought preparation tools is to use a conservative stocking rate. We maintain the number of animals that we know can graze even in a dry year, rather than permanently stocking for the best years. We can always adjust our stocking rate up when we have lots of grass (by purchasing feeder lambs or grazing someone else's sheep). This also means that we save some of the grass that grows each spring to come back to in the fall - this dry forage is the buffer that ensures we can carry our livestock through until the grass starts to grow again.
But this dry forage can represent a fire hazard in the summer and early autumn months. By consuming grass, broadleaf plants and brush, grazing and browsing livestock can help reduce fire risk by removing or modifying these fine fuels. For some, biomass utilization conjures images of high-tech power plants utilizing wood chips to generate electricity; for me, biomass utilization means that livestock eat plants; plants that might otherwise burn in the summer and fall.
These differing perspectives on the value of (or threat from) dry forage set up potential conflicts between grazing tenants and grazing landlords. The tenant, by necessity, wants to save grass for fall (a "non-rainy day" fund of sorts); the landlord wants to reduce fire danger. How do we meet the needs of both parties?
I'm not certain that I've figured out the answer to this conundrum, but perhaps our experience in managing our sheep this summer and fall might shed some light on one approach. After talking with the community that owns our winter grazing land, we weaned our lambs 3-4 weeks earlier than normal so that we could move ewes back to dry forage (dry ewes have significantly lower nutritional demands than lactating ewes or growing lambs). With input from the homeowners, we focused our summer grazing on the most vulnerable areas - south-facing slopes adjacent to homes, roadsides where fires could start, and weed-infested areas that needed summer grazing impact.
A careful accounting of our year suggests that our efforts, while beneficial to the neighborhood, were costly to us. Our early-weaned lambs were lighter than usual when we sold them, which meant lower income. Our replacement ewe lambs haven't grown as well as we expected. Our ewes needed supplemental protein (to allow them to digest dry grass) for 3-4 weeks longer than normal, which meant higher expenses. In other words, it cost us money to manage someone else's fuel loading problem.
These economic impacts are even more pronounced for cattle producers. Since sheep and goats have much shorter gestation periods, we typically have a 2-3 month window where their nutritional requirements are quite low - we can push them to manage dry forage and not impact next year's lamb or kid crop. Cattle, on the other hand, must re-breed 85-90 days after they deliver their calf - which makes nutrition between this year's calving and breeding for next year's calf crop a much more critical consideration.
Timing is also critical. In my experience, the critical time for reducing fuel loads with grazing is late spring and early summer - after the last rain but before the forage becomes tender dry. In reality, this means we need to cover lots of ground in a 4-6 week period - and few of us have enough livestock at that point in the grazing year to move that quickly. The challenge is further complicated by the fact that our annual grasses are less palatable at this growth stage.
Ultimately, grazing can be an incredibly important tool in reducing fire danger in our Mediterranean climate. Using this tool effectively, however, has value (and costs) - just like any other fuel-load reduction tool. As a rancher, I want to make sure I have some dry grass to come back to in the fall. This doesn't solve the fuel-loading problem; my community's fuel load is my fall forage. We need to re-think our grazing arrangements to reflect this reality!
- Author: Dan Macon
As you probably know if you've read previous posts on Ranching in the Sierra Foothills, my go-to tool for protecting sheep on our foothill rangeland and irrigated pasture is my livestock guardian dogs. Since we're trying to protect our sheep from carnivores, it makes sense to protect them with a carnivore! The right dog (or dogs) will protect our sheep from stray dogs, coyotes, mountain lions, black bears, foxes, and other predators. Check these previous posts to learn more about our livestock guardian dogs:
But livestock guardian dogs are not the only tool available! Some recent research suggests that an ever-changing mix of livestock protection tools may be necessary. Predators can adapt, and so must livestock producers. A 2017 paper in the Journal of Mammalogy tracked the adaptive use of a suite of nonlethal livestock protection tools in Idaho (see Stone et al. 2017, "Adaptive use of nonlethal strategies for minimizing wolf-sheep conflict in Idaho"). Other research acknowledges the difficulty designing experimental studies to analyze the effectiveness of specific tools (see Eklund et al. 2017, "Limited evidence on the effectiveness of interventions to reduce livestock predation by large carnivores").
But formal research isn't the only approach to determining whether a given tool works in a specific environment. On-the-ground use of these tools by ranchers in real-world production settings is invaluable. In my experience, the success or failure of a particular livestock protection tool depends, at least in part, on the paradigm and know-how of the person using the tool. I expect the livestock guardian dogs I've "trained" to work in my environment - and when they don't, I try to learn from my mistakes. My own hands-on experience with these dogs gives me a greater level of comfort in using them in a variety of settings. Similarly, my familiarity with electro-net fencing helps me adapt this tool to our environment.
Recently, a group of colleagues and I received grant funding to put on a series of Livestock Protection Tool Field Days in a number of northern California counties that have been visited by gray wolves (Nevada, Sierra, Plumas, Lassen, Modoc and Siskiyou). These field days will be held in late March 2019 (check the calendar on my website for exact dates - go to https://ucanr.edu/sites/Livestock/). In addition to providing information about using livestock guardian dogs in rangeland environments with both cattle and sheep, these field days will give producers an opportunity to set up and use some additional tools, including electro-net fencing, turbo fladry (an electrified fence with flapping red flags that apparently deters wolves), and FoxLights (a device that emits random flashes of light to mimic a person with a flashlight).
We've also purchased a half-mile of turbo fladry. Sometime in the next month, we'll set up a fladry barrier to familiarize ourselves with setting it up and taking it down. Stay tuned for information on this, as well!
As with any tools, there will be a learning curve for these new techniques. I've built lots of temporary electric fence, but laying out a quarter-mile of poly-wire with red vinyl flags will take a different technique. I'll need to learn to place the wire at the proper height to deter wolves. I'll need to figure out how to re-wind the fladry. As always, I'll track the cost of using these tools, as well. With livestock guardian dogs, the costs include dog food and vet bills. With fladry, the cost will mostly involve my own time.
Finally, I know that I learn best by doing. Reading about a technique or a tool is a helpful introduction, but I need to use these tools in a real-world setting to gain any sense about their effectiveness - and about my willingness to use them. I suspect many of you feel the same way! I hope you'll be able to make one of our field days in March!