The information below has been supplied by dairy marketers and other industry organizations. It has not been edited, verified or endorsed by Hoard’s Dairyman.

Treating cows properly at the beginning of the dry period can have a big impact on the success of their next lactation. While most cows form a keratin plug that seals off the teat canal to prevent the entry of mastitis-causing pathogens, it often doesn’t happen soon enough in today’s high-producing animals. The use of an internal teat sealant is an effective tool to protect cows.
“A cow is most susceptible to getting a new mastitis infection at the beginning of a dry period,” said Curt Vlietstra, DVM, Boehringer Ingelheim. “She’s usually been milking for more than 300 days, and it takes her a few days for the teat end to begin to close up and provide that natural barrier to new infections.”
Sealant simulates a natural barrier
According to Dr. Vlietstra, an effective internal teat sealant is essentially doing what the cow is supposed to do on her own. “But not every cow forms that plug, and sometimes its formation is delayed,” he said. “When you use an internal teat sealant at dry-off, you’re providing an immediate barrier while the cow is waiting to make her own, and you’re eliminating the risk of infection if she doesn’t.”
Teat sealants provide secondary benefits, as well. “Most of the time, antibiotics don’t last for the length of the dry period, so a cow can be susceptible to intramammary infections before she has that next calf, when her immune system is weaker,” explained Dr. Vlietstra. “Using an internal teat sealant protects cows throughout the entire dry period.” Teat sealants also work well in conjunction with antibiotic therapy when it is needed.
Supplying protection against infections gives the cow’s udder a chance to heal, he added. “So, when she has the next calf and starts the next lactation, she’s able to make good milk — and hopefully a lot of it.”
Steps to a sterile barrier
An effective internal teat sealant provides a sterile barrier between the udder and its environment. Thorough cleaning of equipment and the animal are essential during sealant application and removal.
Following these steps will help to ensure no pathogens are introduced:
- Empty the udder, ensuring each quarter is completely milked out.
- Use clean syringes and gloves for each cow.
- Clean each teat with germicidal solution, allowing 30 seconds of contact, then dry with a clean towel.
- Thoroughly clean each teat end with an alcohol-soaked pad, starting with the farthest teats.
- Uncap the sealant syringe, being careful not to touch the tip. Only uncap one syringe at a time.
- Infuse teats in the opposite direction they were cleaned (i.e., infuse closest teats first).
- Pinch the teat where it joins the base of the udder to prevent sealant from going beyond the teat canal.
- Inject sealant as directed.
- Don’t massage sealant into the udder.
- Apply a post-milking teat disinfectant.
“Using a colored teat sealant adds to application convenience, and makes it easy to distinguish from the milk during removal at calving time,” concluded Dr. Vlietstra. “It’s much easier for employees to recognize, and as a result, they have more consistent success with sealant clean-out.
Boehringer Ingelheim Animal Health
The lives of animals and humans are interconnected in deep and complex ways. We know that when animals are healthy, humans are healthier too. Across the globe, our 9,700 employees are dedicated to delivering value through innovation, thus enhancing the well-being of both.
Respect for animals, humans and the environment guides us every day. We develop solutions and provide services to protect animals from disease and pain. We support our customers in taking care of the health of their animals and protect our communities against life- and society-threatening diseases.
Boehringer Ingelheim Animal Health is the second largest animal health business in the world, with net sales of $4.7 billion (4.1 billion euros) in 2020 and presence in more than 150 countries.
Boehringer Ingelheim Animal Health has a significant presence in the United States, with more than 3,100 employees in places that include Georgia, Missouri, Iowa, Minnesota, New Jersey and Puerto Rico. To learn more, visit www.boehringer-ingelheim.us, www.facebook.com/BoehringerAHUS or www.twitter.com/Boehringer_AH.
Boehringer Ingelheim
Making new and better medicines for humans and animals is at the heart of what we do. Our mission is to create breakthrough therapies that change lives. Since its founding in 1885, Boehringer Ingelheim has been independent and family owned. We have the freedom to pursue our long-term vision, looking ahead to identify the health challenges of the future and targeting those areas of need where we can do the most good.
As a world-leading, research-driven pharmaceutical company, with around 52,000 employees, we create value through innovation daily for our three business areas: Human Pharma, Animal Health, and Biopharmaceutical Contract Manufacturing.
In 2020, Boehringer Ingelheim achieved net sales of around $22.33 billion (19.57 billion euros). Our significant investment of over $4.2 billion (3.7 billion euros) in 2020 (18.9% of net sales) in R&D drives innovation, enabling the next generation of medicines that save lives and improve quality of life.
We realize more scientific opportunities by embracing the power of partnership and diversity of experts across the life-science community. By working together, we accelerate the delivery of the next medical breakthrough that will transform the lives of patients now, and in generations to come.