On the Strange Animals Blog is a post about “chicken hypnosis” (Beredimas, 2014), which is more accurately referred to as tonic immobility–“a state of reduced responsiveness induced by physical restraint” (Bryan Jones & Faure, 1981). Tonic immobility is thought to be an adaptive response to situations that cause chickens to become fearful, similar to animals “freezing” when they become aware of a potential predator.
Tonic immobility can be induced in several ways, but the various techniques typically involve physically restraining the chicken for a short period of time. Here is a video showing one of the techniques (other videos of “chicken hypnosis” induction techniques can be found here).
Beredimas, D. (2014, February 27). How to hypnotize a chicken. Strange Animals Blog. Retrieved from http://www.strangeanimals.info/2014/02/how-to-hypnotize-chicken.html
Bryan Jones, R., & Faure, J. M. (1981). Tonic immobility (“righting time”) in laying hens housed in cages and pens. Applied Animal Ethology, 7, 369-372. doi: 10.1016/0304-3762(81)90063-8