At a recent writers conference I pitched my story to several agents, some of whom requested partials/fulls. I just got some critique back from one of those agents which apply to the whole manuscript (I'm working on the revisions right now). The agent wants me to resubmit the revised version, but at this point would I also send that revised version to the other agents? If so, do I shoot them an email first asking if they want that revised version? Or do I just do nothing? What's the protocol?
You send the revisions to the agent who guided you in making them first. If that agent passes (or dawdles too long!), you email the other agents to say you have a spiffier updated version of the manuscript and would they like to see it?