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This paper extends existing activity identification methods and describes a new method to identify and assess the activity of chickens with different gait scores in a small flock. The chickens were scored for their degree of lameness by experts according to the method of Kestin et al. (1992). Five birds were selected in each of six gait score groups (GS0 to GS5). The chickens used were in total 30 Ross-308 chickens at the age of 26 days. The experimental period of in total 12 days was subdivided into two times six days were two different experiments were carried out.