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Hatching method correlates to early growth in chickens but not later performance
Carria Xie1, Shemil P Macelline1, Robin R Melwani1
1School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney NSW 2006, Australia; Poultry Research Foundation, The University of Sydney, Brownlow Hill, Sydney NSW 2570, Australia.
Poultry Science
|January 24, 2026
Summary
On-farm hatching boosts early broiler growth up to 28 days, but benefits fade by day 39. Hydrolyzed yeast improved protein digestibility but not overall performance.
Area of Science:
- Animal Science
- Poultry Science
- Nutritional Science
Background:
- On-farm hatching reduces chick stress compared to conventional hatcheries.
- Early life nutrition and management impact broiler performance and welfare.
Purpose of the Study:
- Investigate interactive effects of hatching method and dietary hydrolyzed yeast on broiler chickens.
- Assess impacts on growth, organ development, protein digestibility, and litter quality.
Main Methods:
- 1,680 broiler chicks from on-farm or conventional hatching systems.
- Starter diets with 0, 5, or 10 g/kg hydrolyzed yeast (2x3 factorial design).
- Monitored growth, organ weights, protein digestibility, and litter parameters.
Main Results:
- On-farm hatched birds showed higher early body weight and feed intake.
- Hydrolyzed yeast at 5 g/kg maximized apparent ileal protein digestibility.
- Early growth advantages of on-farm hatching diminished by day 39.
Conclusions:
- On-farm hatching offers temporary early growth benefits, potentially for specific market targets.
- Hydrolyzed yeast improved protein digestibility but not growth or carcass traits in this study.
- Further research needed on hydrolyzed yeast with poor protein sources and on-farm hatching under stress.
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