I doubt it. It hasn't been that long. They don't decay _that_ quickly.

If Ansom decides to go full offensive after seeing this attack, he can order the flying group to attack Gobwin Knob immediately if the Knob has no warlords. Every pathetically weak Uncroaked stack will be forced to attack the uber Archons and die without inflicting significant, or even any, damage. He needs some Warlords on defense in case Ansom decides to take advantage of the fact that most of the Dragons aren't in Gobwin Knob at the moment. The fliers can probably reach GK from there in a turn.