Profitability · For Producers

See what
feed becomes.

Feed is up to 70% of your operating cost. Identify your most efficient cows or bulls — and capture the $1,356/cow/yr profitability gap between your top and bottom quartile animals.

The Global Standard · For Researchers

The Global Standard for
Emissions Measurement

Built on mass flux methodology, GreenFeed delivers precise, standardized emissions measurements that can be directly compared across studies, geographies, and production systems, powering over 800 peer-reviewed publications.

Herd Ranking · For Producers

Identify Your 
Herds Top Performers

We track daily feed intake and weight to identify the cattle that perform best, helping you improve efficiency and profit.

Defensible Data · For Researchers

Data That Stands Up
to Peer Review

With validation against respiration chambers (r > 0.95), GreenFeed produces rigorous, repeatable data trusted across academic and government research—ready for publication, defense, and real-world application.

Watch the Story :30

About C-Lock

Setting the Global Standard in Emission & Performance Monitoring

Discover how C-Lock, Inc. is transforming the livestock industry by delivering precise emissions data alongside individual animal intake and weight measurements. Together, GreenFeed and SmartLine technologies provide the data needed to improve feed efficiency, optimize herd genetics, and support sustainability goals.

Founded in 2005 in Rapid City, South Dakota, C-Lock advances modern agriculture through innovation and environmental stewardship — trusted by researchers, producers, and sustainability leaders worldwide.

2005
Founded
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Studies

Applications

Two Product Families.
One Complete Picture.

Whether you're publishing a study, running a feedlot, or proving a Scope 3 reduction, the answer depends on measuring what each animal actually does. We measure both sides of that equation — emissions and performance — so the picture is complete.

Emissions Monitoring

GreenFeedGlobal Standard Emissions Measurement

  1. Accurate Methane Measurement

    Mass-flux methodology captures precise, repeatable methane and CO₂ data at the individual animal and herd level.

  2. Data-Driven Sustainability

    Quantify emissions to support sustainability reporting, mitigation strategies, and research-backed environmental goals.

  3. Improved Herd Genetics

    Identify low-emitting, high-performing animals to inform genetic selection and long-term herd improvement.

  4. Feed Efficiency Insights

    Link emissions data with intake and performance to evaluate feed efficiency and optimize nutrition strategies.

Explore GreenFeed →

Performance Monitoring

SmartLineIndividual Animal Performance

  1. Individual Intake Measurement

    Accurately capture feed and water intake at the individual animal level to understand consumption and efficiency.

  2. Real-Time Weight Tracking

    Monitor individual weights and growth trends to evaluate performance, health, and management outcomes.

  3. Improved Feed Efficiency

    Combine intake and weight data to identify top-performing animals, optimize rations, and reduce feed waste.

  4. Genetic & Management Decisions

    Generate reliable performance data to inform herd genetics, research outcomes, and long-term production strategies.

Explore SmartLine →

For Producers

Feed Is Your Biggest Cost.
It's Also Your Biggest Opportunity.

See What Feed Becomes.™

Two cows in the same pen, eating the same ration, can produce wildly different returns. Feed is up to 70% of your operating cost — but until now, you've had no way to know which animals turn it into pounds, milk, or marbling, and which ones are quietly costing you money.

C-Lock changes that. By measuring intake, weight, water, and emissions on every individual animal, we hand you the data to make better breeding, nutrition, and culling decisions — backed by the same science that powers 800+ peer-reviewed studies.

Breed

Identify the most efficient genetics in your herd.

Feed

Optimize rations and nutrition for real performance.

Monitor

Watch animal for signs of performance loss.

Cull

Stop carrying animals that aren't earning their keep.

The Profitability Spread
Top vs. Bottom Quartile
M
Measure
R
Rank
$
Profit
$0 / cow / yr
Profitability Gap
Dairy at $18.50/cwt

Who We Serve

You Can't Manage What You
Don't Measure.

From peer-reviewed research to commercial production and global sustainability, C-Lock can help customers maximize their results and define the future of livestock.

Global Reach & Scientific Validation

Globally Standardized and Validated.

Operating in 50+ countries, C-Lock is the global leader in precision technologies for monitoring ruminant emissions and performance. Real-time, defensible data connecting corporations, laboratories, feedlots and research stations across the world.

Rapid City, SD
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Countries
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Continents
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Years Deployed

Worldwide Comparability.

C-Lock delivers globally consistent, comparable emissions measurements across all regions and environments. As the only technology enabling true worldwide comparability, it sets the standard for accuracy and consistency.

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Peer-reviewed publications
1TRILLION
Data points collected
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Instruments in the field
r>0.95
vs. respiration chambers
Headquarters · Origin
Rapid City, South Dakota · USA

News & Insights

Latest from C-Lock

Latest from C-Lock

News & Insights

View All News →
GreenFeed
Apr 21, 2026 · GreenFeed

New research compares respiration chamber and GreenFeed to measure feed efficiency in dairy cows

Accurately measuring how efficiently a dairy cow converts feed into milk has long been a challenge for both producers and researchers. While feed accounts for the single largest…

Read More →

Get Started

Ready to see what
feed becomes?

Talk to a C-Lock specialist. We’ll show you what measurement looks like for your operation, whether it’s beef, dairy, research, or a sustainability program, in one conversation.