Commercial Study - Orego-Stim® Powder Supports Efficient Cage-Free Egg Production


  • The objective of this commercial study was to determine the effect of Orego-Stim® Powder (OSP), supplemented at 300 g/t, on the performance of laying hens in a cage-free production system.
  • Hens supplemented with OSP produced 13 extra eggs, had a 14-point improvement in feed conversion ratio, indicating improved feed efficiency, demonstrated a 4% higher liveability and achieved an overall ROI of 24:1.

  • In conclusion, OSP may help support improved egg production, feed efficiency and profitability in conventional cage-free production systems.


  • Producing eggs in cage-free systems is associated with various technical and financial challenges.
  • Orego-Stim® Powder (OSP) is a high quality eubiotic composed of 100% natural oregano oil (OEO) and in previous trials has been shown to support laying hen performance.


A commercial trial was conducted in collaboration with a commercial egg producer in the USA in 2021/2022, to determine the effect of OSP on the performance of laying hens in a conventional cage-free production system. Two groups of 100,000 H&N hens were used in the study; a control group and an OSP supplemented group. OSP was included at 300 g/t from day old until 43 weeks of age. Performance data was collected weekly.


orego stim lifetime egg production
Broiler performance at day 30
Broiler performance at day 30
Compared to the control group, hens supplemented with OSP:
  • Had a 5.5% higher average egg production, with improved peak production and laying persistency (Figure 1). 
  • Produced 13 extra eggs each (Figure 2). 
  • Consumed 9% less feed per egg produced (control 145g feed/egg, OSP 132g feed/egg). 
  • Showed a 14-point improvement in feed conversion ratio (FCR) (Figure 3).
  • Produced 10% more egg mass (control 6.94 kg/bird, OSP 7.62 kg/bird). 
  • Had 4% improved liveability (Figure 4), with an odds of survival when using OSP of 2.5:1 (Pearson’s Chi Square p<0.001).
  • Achieved an overall return on investment of 24:1.


Supplementing birds with OSP at 300 g/t throughout rear and lay may help support improved egg production, feed efficiency and profitability in cage-free production systems.

Want to see the benefits for yourself?

Orego-Stim Range



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Disclaimer: No guarantee of performance is given. All economic benefits claimed in this document were correct at the time of publication.

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