In the spring when a bear comes out of his den he or she will naturally eat grasses to aid in the digestive processes that have been put on hold from hibrination. Hunt fresh grasses. Where I live and hunt bears there is no better spot than a high mountain glade or a grassy logging road or grassy parts of a clearcut in April or May. June rolls around and the rut for bears kicks in and so do their digestive tracts. Cow elk and deer are all calving/fawning, you know what this means for the bears diet! Goodluck.