i just shot all its heads off and it was still alive but could do no damage, it could even jump but thats about it... when i quit and reloaded the heads were back but... hey who doesn't like having a pet headless hydra for a while?
(btw just shoot off a head then rest at the bonfire, the head will stay gone, repeat until headless)
(btw just shoot off a head then rest at the bonfire, the head will stay gone, repeat until headless)