Sometimes a slight lure change is all it takes to fire up fish that have turned off. If they won't bite the DOA Shrimp anymore, toss a Vudu shrimp at them. A slight variation can get a school of fish fired back up in a hurry!
Pro Tip: When fishing schooling redfish; try throwing a slightly different lure(or same lure in slightly different color) before the fish stop biting. Changing it up is a great way to keep them biting.