Statistical Interaction Modeling of Bovine Herd Behaviors

While there has been interest in modeling the group behavior of herds or flocks, much of this work has focused on simulating their collective spatial motion patterns, which have not accounted for individuality in the herd and instead assume a homogenized role for all members or subgroups of the herd. Animal behavior experts have noted that domestic animals exhibit behaviors that are indicative of social hierarchy: leader/follower type behaviors are present as well as dominance and subordination, aggression and rank order, and specific social affiliations may also exist. Both wild and domestic cattle are social species, and group behaviors are likely to be influenced by the expression of specific social interactions. In this paper, global positioning system coordinate fixes gathered from a herd of beef cows tracked in open fields over several days at a time are utilized to learn a model that focuses on the interactions within the herd as well as its overall movement. Using these data, in this way, explores the validity of existing group behavior models against actual herding behaviors. Domain knowledge, location geography, and human observations are utilized to explain the causes of these deviations from this idealized behavior.