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The objectives of this study were to examine how frequency of feed delivery affects 1) the behavior of group-housed and group-fed dairy cows and 2) the extent of feed sorting. These objectives were tested in two experiments. In each experiment, 48 lactating Holstein cows, split into groups of 12, were subjected to each of 2 treatments (over 10-d periods) in a cross-over design. The treatments for the first experiment were 1) delivery of feed once per day (1×) and 2) delivery of feed twice per day (2×). Treatments for the second experiment were 1) delivery of feed 2× and 2) delivery of feed four times per day (4×). For the 1×, 2×, and 4× treatments, feed was pushed up 3, 2, and 0 times per day, respectively. For both experiments, cows had 0.6m of feeding space; one cows was allowed per lying stall. Time-lapse video was used to quantify the feeding and lying behavior, as well as the aggressive behavior displayed at the …