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December 4, 2025

FDA Conditionally Approves Merck Animal Health’s EXZOLT™ CATTLE-CA1 for the Prevention and Treatment of New World Screwworm (Cochliomyia hominivorax) Larvae (myiasis)

Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced the U.S. Food and Drug Administration (FDA) has granted a conditional approval for EXZOLT™ CATTLE-CA1 (fluralaner topical solution). This innovative product is in the newest class of parasiticides known as isoxazolines.

Mexico’s SADER Approves Merck Animal Health’s EXZOLT® 5% Pour-On (Fluralaner 50 mg/mL) for the Prevention and Treatment of New World Screwworm (Cochliomyia hominivorax) Larvae (Myiasis)

Veterinarians and cattle producers in Mexico have access to a new tool to protect cattle from New World Screwworm, helping to safeguard Mexico’s beef supply RAHWAY, N.J., November 4, 2025 – Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J

New Data from Merck Animal Health Demonstrates that Intranasal Vaccination Against Bovine Coronavirus with BOVILIS® NASALGEN®-C (Lyophilisate and Solvent for Suspension for Cattle) Significantly Improves Production in Veal Calves

Vaccinated calves showed fewer lung lesions and achieved a significantly higher body weight than unvaccinated calves Rahway, N.J., October 23, 2025 – Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced the presentation of new data

Merck Animal Health Presents New Data Demonstrating the Safety, Efficacy and Quick Onset of Injectable Formulation of BRAVECTO® (fluralaner) at World Small Animal Veterinary Association Congress

Additional educational symposia offer the latest information on vector-borne diseases, infectious diseases and treatment and prevention protocols Rahway, NJ, September 26, 2025 – Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced it will present multiple

Merck Animal Health Strengthens Its Dedication to Rabies Elimination with 7 Millionth Vaccine Donation Through the Afya Program

RAHWAY, N.J., Sept. 26, 2025 – Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced it has donated more than seven million NOBIVAC® rabies vaccines through the Company’s Afya Program, since it was founded.

New Study Confirms Rapid Action of PROTAZIL® (1.56% diclazuril) Antiprotozoal Pellets for the Treatment of Equine Protozoal Myeloencephalitis (EPM)

Diclazuril reaches therapeutic levels within 12 hours, reinforcing the drug as a first-line EPM treatment option RAHWAY, N.J., September 24, 2025 – Merck Animal Health, known as MSD Animal Health outside of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced the results of a new

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Featured Stories

Addressing America’s Rural Veterinarian Shortage Helps Support and Protect Our Food Supply

Food animal veterinarians are the unsung heroes of American agriculture. They do more than deliver calves or conduct routine check-ups. They inspect livestock, administer vaccines, and provide critical guidance on herd health. They support not just animal welfare but the viability of family farms, local economies, and the safety of the food on our tables.

Saving the Herds of Lapland: How an Antiparasitic Drug Helped Preserve Reindeer, Livelihoods, and Culture

In the early 1970s, reindeer herds across Lapland were in crisis. Parasitic infections were decimating calves, with losses in some herds reaching as high as sixty percent.

Protecting Tilapia Production: Field Evidence that Vaccination Saves Fish and Stabilizes Yields

Streptococcosis and a viral disease known as infectious spleen and kidney necrosis (ISKNV) are two of the most consequential infectious threats to tilapia farmers worldwide.

Youngstock: Why the Young Matter Most on Every Cattle Farm

Healthy calves and weanlings grow into productive cows and bulls that determine a herd’s longevity, fertility and financial return.

Immunity-led protection in calves: building health from day one

Calves arrive in the world with huge potential and fragile defenses. Immunity-led protection is a practical, evidence-informed approach that combines colostrum management, nutrition, vaccination and hygiene to support calf immunity while reducing pathogen exposure. The goal is simple: reduce disease, improve growth and productivity, and lower labor and treatment costs. Here is a clear, farm-focused guide to what immunity-led protection means in practice and how to put it into action.

The Advantages of Behavior Monitoring Technology in Dairy Cow Performance and Well-Being

Advancements in dairy technology are transforming how farmers manage their herds, providing valuable insights into cow behavior, health, and productivity. Behavior monitoring tools, such as wearable devices and sensors, have emerged as essential for both confined production systems and outdoor grazing setups. These technologies offer a 24/7 window into cows’ lives, improving performance and well-being while addressing the unique challenges of each farming system.

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