Introduction. The following is a step by step guide to help you learn to assign body condition scores (BCS) based on the process described by Ferguson et al., 1994. Scorers using this method will be able to assign BCS consistently and accurately. . Ferguson, J. D., D. T. Galligan, and N. Thomsen. 1994. Principal descriptors of body condition score in Holstein cows. J. Dairy Sci. 77:2695-2703..