StopLac Webinar Recap: Key Takeaways

On June 17th, AHV International hosted a live webinar for veterinarians and animal health advisors, diving deep into the evolving science of dry cow management. The session explored whether the dry period is a time of rest, reset, or preparation—and introduced StopLac, a novel oral feed additive designed to support a healthier, more efficient dry-off process.

Traditionally seen as a rest phase, the dry period is now recognized as a metabolically active reset that prepares cows for the next lactation. Dr. Prof. Alex Bach and Dr. Léonard Theron emphasized that this phase is critical for immune function, udder regeneration, and future productivity.

A poll revealed that while 30% of 110 attendees are decision-makers in dry cow strategy, many others play key roles in monitoring outcomes like mastitis and milk yield. This highlights the importance of a collaborative, informed approach to dry cow management.

Key Indicators of Success

The webinar outlined several KPIs for dry period success:

• Cow comfort and behavior: 64% of the audience cited these as top priorities.
• Mastitis control: Fewer new infections at dry-off signal better hygiene and lower stress.
• Dry matter intake (DMI): Maintaining intake supports immunity and reduces disease risk.

Best Practices for Dry-Off

The experts agreed that a 58–60 day dry period is ideal for multiparous cows, while primiparous cows may benefit from slightly longer durations. Abrupt dry-off was favored over gradual feed restriction, which can increase stress and metabolic strain.

Nutritional support is essential—especially starch (to stimulate insulin), vitamin E, and selenium—to maintain immune function during this transition.

Introducing StopLac

A highlight of the webinar was the introduction of StopLac, a new feed additive that:

• Reduces milk yield by ~56% to support abrupt dry-off
• Requires no antibiotics or withdrawal time
• Modulates the rumen microbiome and supports immune health

Early studies show that StopLac-treated cows experience faster mammary involution, lower metabolic stress, and better calcium/phosphorus balance around calving. Importantly, no adverse effects on blood parameters were observed.

Looking Ahead: Selective Dry Cow Therapy

Selective dry cow therapy (SDCT) is gaining traction as a way to reduce antibiotic use by up to 50%. However, implementing SDCT effectively requires clear protocols and decision-support tools. AI-powered apps are in development to help vets and farmers make informed choices based on somatic cell counts, milk yield, and other data.

Conclusion

Dry cow management is no longer just about rest—it’s a strategic reset that can shape the health and productivity of the entire herd. With tools like StopLac and a renewed focus on selective therapy, the future of dairy health is more sustainable, efficient, and welfare-focused than ever.