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Some California Veterinarians Say Virus-Hit Dairies See More Abortions in First-Calf Heifers and Dry Cows

Tue, 14 Jan 2025 20:11:12 GMT

Triple-digit temperatures lasting for days and then weeks helped fuel a firestorm of highly pathogenic avian influenza A virus (HPAI A H5N1) cases on California dairy farms last summer.

“August wasn’t too bad, September was kind of rough, and then early October was severe,” recalls Dr. Maxwell Beal. “I think part of the problem was the cows had little relief from the heat even at night.”

But even with the onset of winter, Beal, with Mill Creek Veterinary Services, Visalia, Calif., adds that, “Cooler temperatures haven’t slowed the spread.”

Indeed, cases of the virus continue to trend upward in California. The state, the single largest producer of milk in the U.S., with 1,300 commercial herds and 1.7 million milk cows, holds the dubious distinction of being the current epicenter for HPAI H5N1.

As of Dec. 19, 2024, the California Department of Food and Agriculture had confirmed 650 dairy cowherds – roughly half of the commercial herds in the state – had been infected with the virus (see AHFSS - AHB - H5N1 Bird Flu Virus in Livestock - CDFA).

Bovine Veterinarian talked with several veterinarians in the Golden State and elsewhere about what their herds, producers and farmworkers have experienced and how they are addressing the virus. This is a summary of what practitioners shared.

Younger Dairy Animals Are Being Affected, As Well As Lactating Cows.

Among production animals on the dairy farm, lactating cows have taken the brunt of the virus infections so far, but that doesn’t mean other segments in cowherds aren’t or can’t be affected.

“I’m hearing reports from California veterinarians of sick young calves and challenges with cows resuming production and reports of dry cows aborting,” says Dr. Barb Petersen, owner and operator of Sunrise Veterinary Service, Amarillo, Texas. Petersen helped confirm the first case of HPAI H5N1 identified in U.S. dairy cattle last spring.

One of those reports came to her from Beal in California.

“I tell people, ‘Don’t sleep on your heifers, calves or your bulls, because there could be issues that we don’t know about yet simply because that’s not been our focus,’” says Beal, who reports that his virus-hit dairies have all experienced an uptick of abortions in first-calf heifers.

“One thing that happens at every affected dairy is we lose more calves, that were already called pregnant, and they’ll be all over the map as far as gestational age,” he says.

“It happens to dry cows, it happens to big calves, and these heifer abortions were all at 180- to 220-days (DCC), somewhere in there,” he adds. “Whether that’s directly caused by the bird flu or it’s caused by the clinical symptoms of the flu, I don’t know. And it’s the same for other veterinarians in our practice to the point that we will go back and reconfirm pregnant animals that we had already reconfirmed.”

Dr. Blaine Melody has had similar experiences: “We’ve consistently seen more early embryonic death and fetal loss at various days of gestation. We have recommended clients switch from long-acting dry cow tubes to lactating if we’re given the heads up before clinical outbreak, via early non-negative bulk tanks,” says Melody, a partner at Lander Veterinary Clinic, Turlock, Calif.

The Virus Amplifies Existing Health And Management Issues.

While HPAI H5N1 is associated with high morbidity and mortality in birds, this hasn’t been the case for dairy cattle in most regions of the country. Most affected animals reportedly recover with supportive treatment, and the mortality/culling rate has been low at 2% or less, according to the American Veterinary Medical Association.

That percentage fits with Beal’s experience in California, but dairy producers in some parts of the state have reported higher mortality levels. Some have experienced cow mortality rates as high as 15% or 20%, according to a Reuters article published in October. See Cows dead from bird flu rot in California

“Cows that get H5N1 are compromised, so any other health issues that are present in the dairy increase,” Beal explains. “Staph aureus, mastitis, mycoplasma, all of them go up.”

“The virus takes the problems that are already on your dairy that you’ve either figured out how to cope with or they’re just sitting at a low level, and it exacerbates them for probably a month,” he adds.

Melody says management quality plays a huge role in what producers and their employees must deal with when the virus hits.

“If you have overcrowded pens, bad cow comfort, poor nutrition management, poor transition cow management or any other underlying risk factors, you will have a worse outcome with a clinical HPAI outbreak. That’s a given,” he says.

In mid-December, California Gov. Gavin Newsom declared a State of Emergency to address the virus in California dairy cattle, ramping up monitoring, quarantine efforts, and resource deployment. See California Issues State of Emergency Warning in Response to More Bird Flu Found on Dairies

The number of farmworkers infected with the virus is likely higher than what’s being reported.

Officially, there have been 66 confirmations of human being infected by the virus in the U.S. See H5 Bird Flu: Current Situation

Melody, Beal and other veterinarians told Bovine Veterinarian they have seen presumed infected employees on farms working with cows.

“Some of these workers are at potential risk, because we don’t know all the ways this virus is spreading yet,” Melody says.

“They just put their heads down and work, so they can keep their paycheck,” Beal adds.

Drenching Cows Can Help, But Rest Can Do As Much Good In Some Scenarios.

Both Beal and Melody say drenching can help clinical HPAI cows, but veterinarians and their producers need a good plan for the treatment to work well.

Beal says there is a significant learning curve for people who have never or seldom drenched a cow. Employees on some of the infected dairies he works with went from never using the practice to suddenly treating hundreds and even thousands of cows a day.

In that intense scenario, Beal says it’s nearly impossible for employees to succeed.

“When you run a drench hose through 1,000 cows, you will not do as good a job with that last cow as you did with the first one,” he explains.

There is real potential to cause more harm than good to the animal physically, Melody adds.

“Drenching can help, but if you’re locking cows up too long or drowning cows because you’re drenching lots of cows and you’re exhausted, that undoes any good you’re trying to accomplish,” he says.

Beal says after working with a couple of outbreaks, he decided to try a different approach.

“We started to use a let-the-cows-rest approach, and I felt like we were still doing just as much good for the animals and not exhausting our staff in the process,” he says.

However, he continued to encourage workers to drench the ones that were clinically dehydrated or exhibiting signs of duress.

“I would say the ones that showed clinical signs to the degree that they warranted treatment has averaged around 30% in a herd,” Beal says. “The ones that are obviously clinically affected we need to treat, but not necessarily the ‘she’s got a runny nose,’ cows.”

What Is Your Definition Of Disease?

Melody says one of the challenges is how veterinarians and producers define disease as well as their definition of severity. With regard to HPAI H5N1, he has observed inconsistent practices and varied approaches to reporting, because people don’t have a consistent benchmark for reference.

“When you get HPAI on dairies, every cow that gets sick is then called a flu cow, but you can’t conflate that it’s all influenza,” he says.

Melody also encourages practitioners to keep a tight rein on their treatment protocols and to maintain consistent practices with regard to regulations.

“If you make things gray, when it comes to regulatory standards, we can quickly start to spiral, because you start going, ‘Well, we made this exception for this, so why not here too?’” Melody says. “Stay with your established playbook, and don’t deviate from it.”

Melody and Beal both say they have been frustrated at times by slow turnarounds by state laboratories responsible for providing test results. Their advice: Be a squeaky wheel with regard to getting virus test results.

“Many testing labs are overrun with samples, and the process gets bogged down, or the results don’t get to the veterinarian because of confidentiality rules,” Melody says.

“Some people are shipping animals that are infected but don’t know it because they didn’t get the information back in a timely fashion from the bulk tank tests,” Beal adds. “There needs to be a reworking of the testing protocols.”

Nutrition And Cow Comfort Practices Can Help Affected Animals Return To Good Production Levels.

Melody and Beal say most of their clients’ cows return to a good level of production post infection.

“Now, do they all come back 100%? No, I haven’t seen that on any of my dairies,” Beal says. “If people compare production now to last December, there’s likely a deficit. Some of the cows are ending up 5 lb. to 6 lb. under where they were this same time last year. That’s not unusual.”

Beal adds that veterinarians who can talk with their clients about what ramifications to expect from the disease, before it ever reaches their herd, can probably save a significant number of cows from being culled in the future.

What can improve that scenario for virus-impacted cows in the future is investing dollars in nutrition and facilities as farm resources permit, Melody adds.

“Renovate your dry cow barn, put some shade over those animals, put a little extra metabolizable protein into the fresh cows right now to make sure they’re getting off to a good start,” Melody advises. “Do good management, the things that you know are going to make your cows strong. Those things will pay for themselves whether you’re in the midst of a virus outbreak or wanting to help cows in the long-term.”

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‘No Established Gold Standard’

Dr. Blaine Melody, a partner at Lander Veterinary Clinic in Turlock, Calif., says somatic cell counts (SCC) are not a gold standard for defining parameters of the HPAI A H5N1 virus. He says SCCs can be wildly different for each farm because of management differences — whether dumping not dumping milk, sturdy versus frail cows, good or bad preexisting milk quality practices.

“My goal is trying to get as close to an apples-to-apples comparison between farms, and you can only decipher that by knowing the farms and asking more questions when people start throwing numbers around,” he says.

Melody offers one real-life example from his experience:

“Two dairies get HPAI at the same time,” Melody says. “One farm gets hammered with a 15% cow clinical mastitis case rate for the duration of the epidemic. The other farm may say it never had any HPAI clinical mastitis cows and only treated a handful of febrile cows with no milk, respiratory or GI disease. You look at their records and can confirm that to be ‘true.’ You ask more questions and also learn that the primary method of identifying mastitis is different between those two farms: the first farm strips and visually screens each quarter for abnormal milk, while the second does not and relies solely on milk conductivity sensors.”

“The vast majority of these clinical cows in our area are mild cases of mastitis with no effect on the udder or cow,” he adds. “This thick, clinical HPAI milk did not get flagged with conductivity sensors. Even within the same brand there can be modified settings farm to farm. The truth in this example ‘lied’ in the salable milk quality when their SCC more than doubled.

“The importance is understanding the farm management differences and knowing what further questions to ask rather than jumping at naked numbers that are often without clear denominators,” Melody says.
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200-Plus Mammal Species Infected

While researchers have learned a lot about HPAI A H5N1 since its confirmation in a Texas dairy herd in March 2024, much is still unknown, including the various ways the disease might spread and which animals it infects.

According to USDA’s APHIS, in addition to dairy cows, more than 200 other mammal species in the U.S. have been infected by the virus since 2022. One of the hardest hit animal populations on farms are barn cats, which often consume colostrum and raw milk, not to mention potentially infected birds and vermin.

Other U.S. mammals infected with the virus include a bottlenose dolphin, foxes, bobcats, mountain lions, coyotes, skunks, harbor and grey seals, opossums, squirrels, minks, otters, black bears, brown bears, polar bears, and a single pig on a backyard farm in Oregon, confirmed in late October.

Your Next Read: I’m Going Into 2025 With Increased Concerns About HPAI H5N1

Understand Yourself Better and Be Better on the Job

Thu, 13 Jul 2023 21:00:38 GMT

Are you interested in being more effective in your business and personal interactions? Are you tired of butting heads with that annoying person on your team day after day? Are you looking for ways to be more efficient as a leader on the farm, in your business or at home?

In a practice tips seminar at the American Association of Swine Veterinarians annual meeting, JD Fiechtner, key account veterinarian for Boehringer Ingelheim, shared tips to help people “Be Better Than Before.”

In the swine industry, continual improvement in production systems isn’t just a good idea, it’s the standard. But Fiechtner points out that it’s all too easy to be so focused on the pigs that we forget to make time for the continuous improvement process in our own lives.

“The key behind all of this is communication. About 90% of corporate errors could be fixed by effective communication, and 75% of communication is received incorrectly in a business setting,” Fiechtner says.

That’s why he decided to present his practice tips session from a different angle – emphasizing communication.

“They say it’s important to know your audience. But I believe knowing yourself is just as important or maybe perhaps more so,” he says.

After trying personality profiling tests such as the DISC Assessment and Myers-Briggs Type Indicator, he heard about the Enneagram. Of course, he said he couldn’t resist trying it out. And it was overwhelmingly helpful.

“I recommend the Enneagram Institute Site where you can take the Rheti 2.5 test, which consists of 144 paired questions. It takes 30 or 40 minutes. It costs $12 online for the Institute to send you your measurements or results from the test for you to discern your basic personality type,” Fiechtner explains.

Not only did he discover more about his dominant personality, but the Enneagram also expands on the basic reflexes of the nine dominant personalities and the positive and negative interactions between the different personality types.

Reflex Actions

Fiechtner says it was helpful to understand his reflex actions and why he reacts the way he does.

“It allows me to take a deep breath now, understand that reflex, and then make a conscious choice of how to respond accordingly. My tendency is to do X, and it may not always be healthy,” he explains.

But he points out the most helpful part is being able to use his knowledge to better interact with others. For example, if he knows ahead of time what someone’s hot buttons may be, he’ll work harder to avoid tripping those negative responses.

“The Enneagram allows me to understand why people respond or react to things. If I’m able, I will prepare ahead of time to hit the primary spots that mean more to them than the negative response applications,” Fiechtner adds. “None of us are perfect. It’s a maturing response process where you can choose to respond in what is the best interest of both of you, rather than just responding according to your reflex emotion.”

Understanding your innate responses can help you become more positive. For example, Fiechtner says he’s a logical, black-and-white, straightforward kind of person. Yet he interacts with people who are on the emotional side and are more aware of their feelings.

“At times, it has been difficult for me to understand that some people do not want to receive my logic just because it’s right,” he says. “I learned I needed to consider how my words may affect their feelings, too.”

If you understand how the other person receives things, you can change how you present them.

“The only place you have control is yourself. So, start there,” Fiechtner says. “I think with a basic understanding of others’ personalities, we can be more accepting. It helps us avoid those pitfalls of negative interactions so we can focus on positive communication and progress, rather than little nuances that may bother us.”

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Over-the-Counter Antibiotics Are Going Away: 5 Tips to Prepare Your Farm

Fri, 28 Oct 2022 20:14:52 GMT

On June 11, 2023, the FDA’s new directive, “Guidance for the Industry #263,” is slated for implementation, meaning that over-the-counter (OTC) antibiotics will no longer be available through traditional retail channels. Instead, these antibiotics will now require a prescription from a licensed veterinarian.

While livestock producers are continuously working to practice judicious antibiotic usage, no longer having the ability to purchase commonly used antibiotics, such as penicillin, can throw farmers a curveball.

Linda Tikofsky, DVM and Senior Associate Director of dairy professional services at Boehringer Ingelheim, says there are several steps producers should be taking now to prepare for the change.

Take Inventory

“I think the number one thing to do is just take inventory of what you’re using and what you won’t be able to purchase after June 2023,” Tikofsky says. “Go through your drug cabinet, take note of what you’re using and how often you’re using it.”

Know What You’re Treating

It’s hard to know what you need if you don’t know what you’re treating. According to Tikofsky, part of judicious antibiotic use is understanding the diseases on your farm and knowing how to treat them.

“Understanding what you’re up against and how to treat a disease is an important part of animal husbandry,” Tikofsky says. “Very often, antibiotics are not the only avenue when treating an illness or condition. Talk with your veterinarian to better understand when and how to treat when using an antibiotic, and work with them to see if there are other treatment options available.”

Prioritize Preventative Management

The best way to avoid using antibiotics is to prioritize preventative management. Take time to review herd health protocols and work proactively with your veterinarian and other consultants to address health issues within the herd.

Talk With Your Vet

Now is the time to work with your veterinarian to develop a plan to adjust the way your farm will access animal health products.

“Going forward, all prescriptions will need to be provided by a licensed veterinarian with whom the producer has a valid veterinary-client-patient relationship,” Tikofsky says. “This really shouldn’t affect farmers too much, it will just require them to have a good working relationship with their vet, which is always the goal. When it comes to obtaining antibiotics, producers will either need to purchase antibiotics from the veterinarians themselves or use a distributor that has a pharmacy license. Your vet should be able to help you find one of these distributers.”

Assemble Your Team

Surrounding your farm with the best team members should always be top of mind. According to Tifkofsky, now is the time to make sure your entire team is on board with your farm’s animal health objectives.

“It’s important to not only talk to your veterinarian about this, but also your nutritionist, herd managers and employees,” she says. “Make sure you’re assembling the right team to set your operation up for success.”

For more on herd health, read:

Veterinary Technicians Key to Underserved Rural Areas

Fri, 20 Nov 2020 05:52:23 GMT

Imagine working less and serving more clients. Is it hard to picture? Maybe it’s time to reimagine what you’re doing—and whether you’re effectively utilizing a critical member of your veterinary team.

Veterinary technicians can be a solution to underserved rural areas, says Dr. K. Fred Gingrich II, the Executive Director of the American Association of Bovine Practitioners (AABP).

“A lot of times veterinarians in those communities are on call 24 hours a day, seven days a week, and the workload can be tremendous,” he says. “And veterinary technicians have the skills and the expertise, that they can do some of those technical procedures, as well as train producers to do those technical procedures, which then frees up the veterinarian to do the things that they are experts at,” he says.

There are a number of opportunities for veterinary technicians to grow within the veterinary profession, and those opportunities don’t stop at the private practice, says Dr. Jason Nickell.

“I would urge you to gain as much experience there as possible. But I would also encourage you to look at opportunities within academia, opportunities within industry opportunities potentially within government,” he says.

Nickell also encourages the veterinary profession to look to human healthcare and how they utilize nurses, nurse practitioners and physician’s assistants as a model to explore to serve rural areas where producer numbers are holding steady but there are fewer large animal veterinarians.

Dr. Geof Smith, professor of ruminant medicine at North Carolina State University School of Veterinary Medicine, agrees.

“I think learning how to use technicians appropriately and food animal practice can be a great builder, particularly in those practices where you’re covering a lot of territory,” he says. “Maybe use the veterinary technician. Veterinarians don’t always have to be on every farm, and we can find ways to utilize those technicians and help us in our day-to-day role.”

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