Producers, researchers, and policy makers have an interest in market effects from meatpacking plant closings and openings. This paper presents results from a study taking a dual approach to determining impacts from an anticipated hog slaughtering plant opening and an unexpected fed cattle slaughtering plant closing. Secondary data are used in a price differences and partial adjustment model. Primary data are used in a logit model. Results indicate a clearer price effect from the plant opening than the plant closing. Primary data provide additional insight into the dynamics related to the two plant events.