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Pregnancy testing- Why it’s important and what options are available

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By Jessica Crabtree and Dr. Jared Harlan 

No matter the breed, the ultimate goal of any cow/calf operations is to have the highest reproductive efficiency. Much like we’ve talked about bulls, cows, too, serve a vital purpose in achieving the objectives of breeding. As producers, pregnancy testing puts them in position to make the best possible decision. With high market prices and cost of feed, each cow must be a producer. If not, she is costing the producer money, especially when selling. Cows sold with a guaranteed live calf attract a higher price at market.

Producers concern themselves with pregnancy testing their cows for multiple reasons. Whether to manage their herds in specific calving periods,helping to determine sire in a artificial insemination program, adding value to cattle going to market, or to cull open cattle.  In the latter case, early detection is key in a non-pregnant cow. Early detection of an open cow translates  to less input without return. Reliable pregnancy testing can be initiated as early as 6 weeks from the end of a breeding season.

Another major reason is determining the age of the calf and its calving date. With that information, producers can separate early calves from those calving later.  This also aids in the culling process, if necessary, to downsize the herd, especially in times of drought. Culling cows based on non-pregnancies is more efficient than basing it off age.  This also alleviates stress from calving season. Producers can replace late-calving cows with heifers that conceived early.

Pregnancy testing is also a great way to detect any abnormalities in cows that may cause infertility. Those may include cystic ovaries, uterine infection, injuries from previous deliveries, or anatomical deficiencies. Pregnancy testing is also a way to control diseases that could affect the entire herd along with management problems. For example, if a herd has a low pregnancy rate, it may indicate problems in an individual bull with poor fertility. Poor fertility throughout the herd may be caused from infectious diseases or inadequate nutritional practices. In the case of Trich. Foetus, culling open cows is a major part of the control program.

Pregnancy testing on cattle is typically done by rectal palpation. Rectal palpation can identify a pregnancy as early as six weeks after conception. It is perhaps the most inexpensive and convenient method. When palpating a cow, the veterinarian feels for the calf’s body, a pulse in the artery supplying the blood to the uterus, cotyledons within the uterus, or the embryonic vessicle within the uterus. This is a convenient option due to low cost of equipment, and immediate results.  However, modern technology and new techniques have advanced in the production area. An alternative to manual palpation is ultrasound assisted evaluation of the reproductive tract. Portable ultrasonic pregnancy detectors may detect a pregnancy earlier than palpation. Doppler scanners have an external probe containing both transmitting and receiving elements that project a beam of low-energy sound waves. The newest technology includes an extension arm. Essentially, it is a probe that doesn’t have to be taken in to the rectum by hand or arm, reducing fatigue on the operator. Another option and advancement in pregnancy testing in blood testing.

The trans-rectal ultrasound has become a great tool for veterinarians to visualize the embryo or fetus and give additional information beyond rectal palpations. Trans-rectal ultrasound can even determine the sex of the calf, according to Dr. Ram Kasimanickam of Washington State University in the article, Pregnancy Testing: New Technology Provides Several Options. He went on to say that the ultrasound can detect a pregnancy with high accuracy as early as 26 days following breeding.

Ultrasonography works in two ways. The traditional ultrasound is arm-in rectal probe. The new trans-rectal ultrasound extension arm probe eliminates the need for putting an arm into every cow. The technology has been around close to 12 years and was designed to makes work easier for veterinarian’s arms. A pro about the trans- rectal probe is that it is an oscillating probe so the rod doesn’t have to be rotated to view the uterus and its contents. A con to the trans-rectal probe is that veterinarians must be cautious when using it. If there is any sudden or unexpected movement, the rectum could be damaged. There is an advanced version of this called Repro-Scan invented by Dr. Andrew Bronson of Alberta, Canada, with his partner Bruce Hill. Their version uses a convex rectal probe that produces a much larger image. Even with these advancements in technology special training is needed to become accurate with these machines.

Blood testing was developed by Dr. Garth Sasser of the University of Idaho. Dr. Sasser found a protein produced by the placenta and detectable in the blood. It is called Pregnancy Specific Protein B. That evolved into his company called BioTracking and into his blood test called BioPry, (Pregnant ruminant yes/no) in 2002. Many believe that drawing a blood sample is actually less stressful for the cattle than other methods of pregnancy detection. In some studies, blood testing has been shown to be more accurate than palpation or ultrasounding, depending on experience drawing blood samples may actually be quicker as well. However turn around time on the test is often several days, which does not allow for decisions to be made while cattle are already gathered. It also requires that each cow be permanently identified. Collecting blood samples is also an easy skill to learn, eliminating the need to schedule a veterinarian.  The blood test is done by taking a blood sample from a vein under the tail. Collection supplies are usually provided by the laboratory performing the testing.

Producers may not choose to pregnancy test at all based on expense. Instead they may choose to monitor oestrus (also called estrus) or returns to heat. Once a cow conceives, all but approximately five percent cease to cycle for the duration of the pregnancy. Oestrus detection after the end of the mating period can be a useful alternative to pregnancy testing, though it may come with some inaccuracy. Due to extra labor required when checking signs of heat, oestrus detection is unlikely to substantially reduce the cost of identifying non-pregnant cows over pregnancy testing. Other measures that can be done to test for pregnancy include measuring the levels of progesterone in the blood or milk. Both involve extra labor and cost.

It is important to remember that no method of determining pregnancy status is 100% accurate. Cost, convenience, accuracy, required equipment, and time investment should all be factors you consider when determining the method you choose. All three have specific cases where incorrect results can be obtained. All three can also be extremely accurate depending on the skill of the person performing each task.  Discussing these options with your veterinarian can help you make decisions best suited to your program. They can also help you to decide based on their skill and preference. Dr Harlan prefers palpation over other methods for the majority of his clients. With adequate facilities and defined breeding dates an average of 100 cows per hour is easily attained. However when short bred cows are needed to be checked, he prefers to have the ultrasound available, at least for a back up to double check opens. He also believes that blood testing is a good option for smaller groups of cattle, especially when inadequate facilities are available for palpation or if all cattle cannot be gathered at the same time.

In conclusion, producers must seek out the best pregnancy testing method for their individual program based on their herd needs. Of the methods discussed, a producer can find which works to identify non-pregnant cows, fertility problems and management problems that need to be addressed to be efficient and achieve ultimate breeding objectives: happy cows and healthy calves.

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Farm & Ranch

Disaster Prep

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By Barry Whitworth, DVM

Chances are that livestock producers at some time or another will be affected by a disaster such as a flood, tornado, drought or wildfire. Whatever the disaster, the challenge of any producer is to take care of their animals. Unlike small animals, farm animals tend to be large and require special needs in an emergency. For this reason, it is important to take the time to prepare a “Disaster Preparedness Plan.”

The plan will hopefully create a step-by-step set of guidelines to follow during a chaotic situation that will keep both animals and humans safe. In any disaster situation, the most important thing for a producer is to ensure above all else that his/her family and life come first. A producer should never attempt to risk his/her life or a member of their family’s life to save the life of an animal.

The start of a good disaster preparedness plan begins with evaluating what are the most likely disasters that a ranch or farm might face. For example, a ranch in the far eastern part of the state may not spend as much time with drought preparation as a ranch in the western part of the state. All producers should take the time to research history and look at weather patterns to understand the most likely disasters they could face.

Next, the producer should evaluate their premises to determine the potential risk to the animals. For example, the producer may want to remove the animals from any area that falls in a flood plain during certain times of the year or have an evacuation plan ready in case of an emergency. One should also evaluate the structures on the property. Are the barns or sheds able to withstand strong winds or not? The answer to that question will determine if the animals will be kept in a barn or turned out in a pasture during a storm.

Stacks of lumber and/or tin should be tied down. This will prevent the material from being blown around and possibly injuring an animal. Areas around a barn should be kept mowed and free of dead debris. This will help reduce risk where there is potential for a wildfire.

These questions and more need to be addressed in preparing the plan.

A disaster preparedness plan should also include animal identification. All animals need some form of identification. Brands, microchips and tattoos make excellent identifications since they are more permanent than other forms. Pictures will help identify animals. The producer should have records of ownership in case animals are lost or die in the disaster. This will be important if the producer is receiving insurance or indemnity payments.

It is important to remember that during a disaster power and utilities may be lost. A livestock owner who relies on electricity for his/her animals will need to have a backup source of power. A seven to 10-day supply of feed and water should be kept on hand. Producers may want to prepare an emergency kit. Items that might be included in the kit are halters, ropes, feed buckets, medications, first aid supplies, cleaning supplies, flashlights, batteries, cell phone, radio, feed, hay, water and generator. These are just a few things that a producer might need in an emergency.

An evacuation may need to be part of a producer’s disaster preparedness plan. Moving large herds of animals is probably not feasible. However, producers may wish to evacuate a small number of animals that have exceptional genetics. If evacuation is an option, producers will need to prearrange for an evacuation site. They will need to establish a route.

The truck should be full of gas and the trailer hitched during unfavorable conditions. Producers need to leave early. A producer should keep in mind that traffic may be increased during a disaster. The last thing a livestock owner needs is to be caught in a disaster stuck on a highway.

The producers will need to take feed and hay or prearrange for delivery to the evacuation site. If the animals are to remain on the farm, the producer will need to establish an area that he/she feels is safest depending on what the disaster is. For example, a pasture with no trees would be safer than a pasture with a few trees that animals would congregate under during a severe storm.

Once the crisis is over, the owner should be prepared to deal with injuries and dead animals. Producers need to have a carcass disposal plan ready in advance. Producers need to check with the local and state officials about the laws for disposing of animals. Producers need to realize that there is a chance that some animals will need to be euthanized. Owners need to be prepared to euthanize or contact a veterinarian to this job.

Planning how to deal with a disaster is like writing a will. Most of us think that we have plenty of time to get it done later. Unfortunately, later usually comes earlier than we like, and we get caught in an emergency with no plan. If a producer would like more information about planning for a disaster, they should go to www.prep4agthreats or contact their local county educator.

This article originally appeared in the June 2018 issue of Oklahoma Farm & Ranch. 

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Farm & Ranch

The Barn

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By Ralph Chain

In 1935 and 1936, when we used to work a lot of mules, my granddad and dad decided to build some mule barns. So, in 1935, we built the first barn where my dad lived and in 1936 we built a barn where my granddad lived. All the work on these barns was done by hand, back before we had cement mixers and the conveniences of life. The work was done by hoe or shovel.

Our neighbors, Sale and Dwight Bennett, and their dad, Claude, helped build the barns. The old man who laid the tile on the barn was Bill Hopper. He was an old bachelor and where he came from or where he went I do not know. But he stayed with my mother and father all during this time while building the west barn. It probably took two or three months to build a barn. He was particular about what he ate. My mother always had to cook for him, and she was glad to see him leave. He also laid the tile for my granddad’s barn. My grandmother cooked for him while he was building that barn.

We used the barn for mules until the late 1940s or early 1950s, when tractors took the place of our mules. I remember my dad trading a team of mules for a D John Deere tractor, which had steel wheel lugs on the back wheel, and you cranked it by hand. I think John Deere built these tractors and called them Argentine, because they were built for sale in Argentina.

When the mules left we converted the west barn. We took out the oat bins and mule stalls and moved our cattle working equipment inside the barn. Each barn had a long oat bin that ran the length of the barn. We filled these bins by scoop shovel with oats that were fed to our work mules.

We converted the east barn the same way but instead of moving our cattle working equipment I converted it to a sheep barn. We used to feed a lot of sheep, and we put the sheep feeders in the barn. Then we quit feeding sheep and the barn was converted into calving pens for our two-year-old heifers.

One day Newley, my grandson, approached me. He and Mandy Hill were getting married and he wanted to have the wedding in our converted school house. I asked him, “Why don’t you have your wedding in the barn?” He nearly fainted when I mentioned the barn. But I told him we would clean the barn up if he wanted to have the wedding there.

He needed to talk to Mandy’s mother, Glenda Hill, and see what she thought about it. She came and looked the barn over and said it if was cleaned up it would be all right. One of the biggest jobs was cleaning the hay out of the hay loft. Some of it had been there ever since the barn had been built. The only way to get it out was using pitchforks through a little door in the north part of the barn. It took three guys several months to get all the hay out of the loft.

It was amazing what they found in the hay. They found collars, harnesses and all kinds of mule and horse equipment. One of the main things they found was whiskey bottles, which had been hidden by some of the hands. They had hid them there because we didn’t believe in drinking.

Then the work started downstairs removing all the calving pens, and we poured a new cement floor. We got a steam cleaner and cleaned the walls, which helped a lot, and repaired some of the windows. On May 16, 1997, the wedding took place, and the reception was held in the hay loft. It went off great.

The barn has been used for all sorts of things from family reunions, hunting business, and special events for handicapped children. We have had people come from New York, California and even the Vice-President of Ecuador.

There is something always going on in the barn. The main event now is the Red Angus Sale that we have had for the past seven or eight years. There will be from 150 to 200 people in and out of the barn during the sale. Both barns are as good as they’ve ever been after 80 years. I don’t know of any other barns anywhere that are still standing after the horsepower went away and people starting using tractors. I can see no reason that the barns shouldn’t last another 80 years. Of course, a tornado or fire could destroy them in a matter of seconds.

Time changes things.

This article originally appeared in the September 2016 issue of Oklahoma Farm & Ranch. 

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Farm & Ranch

The Working Dog

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By Laci Jones

A dog is commonly referred to as “man’s best friend,” but is the saying still true for a working dog?

Randy Reed, an Oklahoma dog trainer for more than 10 years said having working dogs on the farm and ranch is helpful because of their ability to sort livestock. He said having a good working dog will make the trainer look good.

“These dogs will teach you just as much as you can teach them,” Reed said. “They are intelligent dogs, and all they want is to work and please you.”

Each dog has a different technique to herding livestock, Reed explained.

“Herding dogs were developed to do certain jobs for different types of livestock and for different types of farming,” said Susan Bennett, president of the Oklahoma Stock Dog Association.

Some dogs, known as headers, will herd livestock by putting pressure toward the stock’s head. Other dogs, known as heelers, will nip at the heels of stock to herd them. Bennett said some dogs can be headers and heelers. Each livestock species may require a different approach, Reed said.

“Working sheep is different than working cattle,” he said. “The dogs can work the sheep with their eyes. You don’t have to be on sheep so tight, but it’s a challenge with cattle.”

For an owner, it may be a challenge to decide which dog breed is appropriate to have. The best working dog breed depends on what livestock species is worked and the owner’s preferences.

Border Collie

Border collies are known for their herding ability, Bennett said. This breed of dog was bred for their intelligence and work ethic.

“The border collies that actually work livestock were never bred for how they looked,” she added.

Border collies typically use their eyes to herd livestock, but they can also be sent into a pasture and gather livestock.

“If you want to pull 300 yearlings off of a wheat pasture, you can pull up to the gate send the border collies out there,” Reed said. “They will bring the cattle right to you and through the gate.”

Bennett said people need to make sure they have jobs for working dogs.

“These dogs have been bred for hundreds of years, and they have to find an outlet for that instinct,” Bennett said.

When the border collies are not working, both Bennett and Reed keep their border collies in pens.

“I can run them loose, but they will overwork the stock,” Reed said. “They are like keeping an eye on kids.”

A downside to having a border collie is some may not have a tough enough bite, Reed said. They may not be as aggressive as other dog breeds.

Kelpie

Kelpies originated from Australia and are typically short, slick-haired dogs. This breed of dog is rangier than most other breeds, Reed said.

“Kelpies’ working style is similar to border collies,” he said.

Like border collies, kelpies are a “fetch” dog, meaning they will bring the livestock back to the owner, he said.

Bennett said the kelpies she has seen are typically more aggressive toward livestock. They have more stamina than most breeds, Reed added.

“When they go to work, they will be in a crouch position,” Reed said. “Their head is going to be down level with their shoulders. The tail is going to be dropped down behind them.”

Good border collies and kelpies have constant control, and they will have a lot of movement with their eyes, he said.

Reed said the American kelpie is close in proximity with the Australian kelpie. However, the American kelpie is weaker than the Australian kelpie.

Australian Cattle Dog

Developed from the native Australian dingo, the Australian cattle dogs was originally bred for driving livestock, Bennett said.

She said most working dogs within this breed are heelers, which is why they are commonly referred to as blue or red heelers, depending on their color.

Australian cattle dogs are typically used in pens and corrals to move livestock, Bennett said. They were not developed to go into open areas and gather livestock.

“We would haul cattle to the sale barn,” Reed said. “There was a blue heeler that would work on the chute and bite the cattle and get them through there.”

However, the Australian cattle dog is not as common in the competition trials as the border collie.

Reed said there is a market for the Australian cattle dog in the state. Australian cattle dogs are in high demand, but their herding ability is still to be determined.

Australian Shepherd

“Back when the United States was being settled, the Australian shepherd was the farm dog to have,” Bennett said.

Bennett said Australian shepherds were bred to be farm dogs, but they have changed in recent years to become show dogs and pets.

“There are very few Australian shepherds that can now go out and do a job,” Bennett said.

The Australian shepherd is not as popular for herding as other breeds today, Reed added.

“They are pretty dogs, but I haven’t seen any stock-oriented,” Reed said.

Reed said Australian shepherds can be trained, but he found them to be easily distracted.

Catahoula

Catahoulas are typically used for hunting. However, these bay-type dogs can be used to work livestock.

Reed said catahoulas and border collies have different styles of working. Unlike the border collie, this breed of dog uses their bark to move livestock, Reed said. Catahoulas will also work the outer perimeter of livestock, he said.

“Catahoulas will hunt livestock because they can use their nose, where the border collie will do everything by the power of their eyes,” Reed said.

Reed said catahoulas would be the better working dog in a situation where the owner needed help finding livestock.

However, working livestock with a catahoula is a team effort. A catahoula dog will not fetch livestock, but they will keep livestock in a “tight wad.” The owner will have to move the cattle themselves.

Cattlemaster

The cattlemaster is a newer breed of working dog. They are a cross between Border collie, pit bull, and kelpie, and they were bred for working cattle, according to Reed. They are more aggressive and have a stronger bite.

However, when cattlemaster was bred to get more bite, they lost their natural herding ability. Reed experienced this firsthand when he trained a cattlemaster.

“There wasn’t the natural ability,” Reed said. “She was just mechanical. I can move her, but she couldn’t read a cow.”

Reed said other breeds of dogs can potentially be used as working dogs including corgis, McNab shepherds and German shepherds. However, before purchasing a new dog, the buyer should research bloodlines and breeders.

“Buy a dog that can be bred to work cattle,” Reed advised. “Go watch the parents work and research who has trained the dogs.”

It is also important to purchase a dog that has been bred to work the specific species of livestock, Bennett added. No matter what dog breed an owner chooses, imported dogs may not always make the best working dogs.

“Just because a dog is imported doesn’t mean it will be better than a dog bred right here in the United States,” Bennett said.

She said there are many more great dogs and trainers in the United States than 20 years ago. It may be helpful to seek advice from a professional to help kick-start a new program, she added.

After purchasing a working dog, it is important to spend extra money to send the dog to a trainer for 30 to 60 days, Reed said. Then, the owner should spend quality time with the dog and the trainer to learn how to work together.

Bennett said each dog may require a different type of training, which may require adjusting. She said incorporating techniques from several different trainers can help the owner and their best friend.

This article was originally published in the January 2016 edition of Oklahoma Farm & Ranch.

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