Standoff-"It's my doggie" or Red-tailed Hawk vs magpies and vulture

I spotted this strange assortment of birds in a prairie-dog town in Otero County. The Red-tailed Hawk had nailed a prairie-dog and was clutching it in it's foot while Black-billed Magpies and a Turkey Vulture brazenly crowded the pressured hawk. When the hawk flew a short distance it was followed by the magpies and another vulture that had been circling. Given the terrible drought that has plagued this area all summer it would seem that scavengers like these magpies and vultures are emboldened. SeEtta