Silkies have a unique skull structure. It is called a vaulted skull. Their skull projects upward instead of being as rounded as most animals' skulls. This gives them a more beautiful crest, but can also be a source of danger. Chickens peck each other, and as we all know, pecks can hurt and draw blood. When a Silkie is pecked at the right spot on its head, it can cause brain damage, leaving the Silkie unsteady, off-balance, walking in circles, or with its head cocked to the side. Sometimes it even kills the Silkie. It is not uncommon for Silkies to have this happen, but luckily chickens have great recuperating powers, and if helped to eat and drink, eventually they will usually recover.