We evaluated diets of eastern woodrats (Neotomafloridana) on Cross Timbers rangeland subjected to experimental brush manipulation. Treatments were tebuthiuron and triclopyr herbicides, applied with and without annual prescribed burning. Untreated ref- erence sites also were evaluated. Microhistological techniques were used to estimate relative percent composition of plant species in diets. A total of 23 plant species were found in diets from summer and winter samples. Eastern woodrats exhibited seasonal variation in diet selection, consuming mostly forbs in summer and browse in winter. Pokeweed (Phytolacca americana) and eastern redcedar (Juniperus virginiana) comprised the greatest percentages of diets in summer and winter, respectively. Experimental brush treatment also influenced diet composition. We hypothesized that eastern woodrats would exhibit opportunistic for- aging behavior and use food types in proportion to their availability. Forb and browse diet classes were used in accordance with availability except for forbs on burned tebuthiuron sites. Eastern woodrats generally followed an opportunistic foraging strategy although oc- casions of selective foraging were observed, presumably in response to increased palatability and/or nutritional quality of available forage.