A Smarter Way to Feed
Enhance rumen fermentation by directly feeding the fiber digesting microbes, improving fiber digestion and protein utilization. This proprietary technology drives feed efficiency, productivity and profitability.
Unlock Whole-herd Performance
Cows fed Zinpro IsoFerm can better partition nutrients when and where they are needed most depending on parity, stage of lactation and reproductive status, taking whole-herd performance to the next level.
*Average results across whole herd. Results differ by stage of lactation and parity.

Build Metabolic Strength During Transition
Unlock peak performance during the most critical phase of life
Zinpro IsoFerm helps cows adapt to intense physiological changes by supporting liver function, stabilizing energy balance and promoting a smoother start to lactation. It’s a proactive approach to managing stress and setting cows up for long-term success.
Begin supplementation at least 21 days pre-calving to maximize your results.
Fuel the Rumen First®
The branched-chain volatile fatty acids that make up Zinpro IsoFerm improve rumen fermentation by directly feeding fiber-digesting microbes.
Optimize the fermentation process for unrivaled results, enabling flexibility in dairy diets to meet specific producer needs while adapting to forage availability.
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Advance Your Operation

Smarter Use of Feed Inputs
Supports lower protein feeding and greater flexibility — react to feedstuff
costs, utilize homegrown resources, improve fiber digestibility.

On-farm Sustainability
Improving feed efficiency is good for the cow, the producer and the planet.

Navigate Stressors
Protect productivity during heat stress and prime the rumen for transition period success.
***This product and its claims are intended solely for select markets and are not authorized or intended for Canadian sale or use.***
Backed by More than 5 Decades
of Dairy Nutrition Expertise
FAQ
Frequently Asked Questions
What is Zinpro IsoFerm?
Zinpro IsoFerm is a proprietary blend of branched-chain volatile fatty acids (BCVFAs) that directly feeds the rumen’s fiber-digesting microbes to improve fiber digestion and protein utilization. Unlike traditional feed supplements, Zinpro IsoFerm targets the microbes responsible for rumen fermentation rather than bypassing the rumen altogether.
How does Zinpro IsoFerm improve rumen fermentation?
Zinpro IsoFerm supplies BCVFAs directly to fiber-digesting bacteria in the rumen — the essential nutrients microbes need to function optimally. By feeding the microbes directly, Zinpro IsoFerm enhances fermentation efficiency, which improves fiber digestion, protein utilization and overall feed efficiency across the herd.
When should I start feeding Zinpro IsoFerm?
For best results, begin supplementing during the close-up period, at least 21 days prior to calving. Starting pre-calving primes the rumen microbiome before the physiological stress of transition, supporting a smoother start to lactation and better whole-herd performance.
What results can I expect from feeding Zinpro IsoFerm?
Average whole-herd results include a 2% decrease in dry matter intake, a 4.3% increase in energy-corrected milk, and a 5.5% improvement in feed efficiency. Results vary by stage of lactation and parity, reflecting improved nutrient partitioning across the herd.
How does Zinpro IsoFerm support the transition cow?
During transition, cows face intense physiological changes including shifts in energy balance, liver function stress and increased risk of ketosis. Zinpro IsoFerm supports liver function, stabilizes energy balance and promotes a smoother start to lactation by optimizing rumen fermentation before and after calving. Begin supplementation at least 21 days pre-calving.
Can Zinpro IsoFerm be used during heat stress?
Yes. Heat stress reduces feed intake and disrupts rumen fermentation, placing additional energy demands on the cow. Zinpro IsoFerm helps maintain rumen fermentation efficiency during periods of heat stress, protecting milk production and overall herd performance when it’s most at risk.
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