Headless Chickens: What the Science Really Says

Live Science explains that chickens do not stay alive for long after their heads are removed: brain death typically occurs within about 30 seconds of neck injury, with the heart dying a few seconds later, and any movement seen is usually reflexive from residual neural activity rather than conscious life. Movements after decapitation can last up to a minute or so, but are not signs of the bird being alive in any meaningful sense. The famous Miracle Mike case involved partial brain preservation and is not representative; it occurred because only part of the brain and brainstem remained, allowing limited life support-like activity under unusual conditions.