Purdue University researchers have completed a new research project that evaluated a unique lighting system to assess welfare and skeletal quality of laying hens. The research was made possible in part by an endowing Foundation gift from MPS Egg Farms and proceeds from the International Poultry Expo, part of the International Production & Processing Expo (IPPE). The research is part of the U.S. Poultry & Egg Association’s comprehensive research program encompassing all phases of poultry and egg production and processing.

According to the project summary, laying hens require correct lighting for proper development and reproduction. However, there is limited research on the effects that different types of light have on the welfare and skeletal quality of the bird. A novel lighting source, Pulsed Alternating Wavelength System (PAWS), is being introduced to the industry and delivers light through a specific pattern of alternating wavelengths in nanosecond pulses. This lighting system may improve the growth rate of birds, decrease the age at first egg, and decrease aggressiveness and nervousness behaviors. 

Dr. Darrin M. Karcher and colleagues evaluated the effects of PAWS on the welfare and skeletal quality of laying hens utilizing traditional bone quality assessment methods and reference point indentation (RPI). Results showed that PAWS lighting appears to improve both physiological and physical welfare as well as most bone quality parameters. Findings also indicate that industry can start implementing these lights without worry of harming the hens. Long-range benefits could include improved bone quality and welfare, which may lead to increased longevity and productivity of hens. Implementing these lights in cage-free production may aid in decreasing keel bone damage.

The full research summary can be found here.