Location: Livestock Behavior Research
Project Number: 5020-32000-011-03
Start Date: Aug 27, 2012
End Date: Jul 30, 2015
180 Hy-line W-36 hens at 30 weeks of age will be used in the study. The hens will be randomly divided into three groups: control (20 °C+/-1°C), heat stressed (37°C+/-1°C) and heat stressed + antioxidant (60 hens/group). The hens will be randomly housed in pair within the group. Heat stress will be started one week after the treatments started. Samples (brain, blood and organs) will be collected at 24 hours (acute) and 10 days (chronic) following heat stress. Chickens’ behavior will be recorded and analyzed for the whole time. Tissue samples will be analyzed using HPLC, RT-PCR, Flow cytometry, and histological staining, respectively. Behavior, immunity, neuroendocrine function, and production will be compared among the treatments. The goal of the study is to develop a treatment for preventing and reducing heat stress response in farm animals.