The threshold is 12 HP in the base fight
Turkey has 20 base HP. Above 60%, Turkey Fury hits twice: first a peck, then an airborne kick. At 60% or below, Blunderbuss replaces it and deals 12 piercing, unguardable damage. The threshold scales with maximum HP; use 60%, not always 12, in a scaled fight.
Do not chip it into the gun phase while unprepared
Recover and arrange your next damage action before crossing the threshold. A plan to survive several Blunderbuss turns needs actual protection; ordinary guard timing cannot rescue it. This route happens during Ghost Chef’s quest, so do not assume the quest’s Ghost Potion reward is already yours on a first attempt.
Quest and reward
Turkey is in the Catacombs and becomes fightable for Kitchen Wizard’s request. It drops Raw Turkey for the quest. It also appears on Pit Floor 34; later returns can have tools that were unavailable during the original quest.