my rhode island red HEN Marsala pecked me until i bleed. talk about demon chickens! and once she pecked my on my lip. that's why i call her demon chicken.you know what works too take a stick or a horse crop and tap the chicken(s) when ever it charges at you . GOOD LUCK!!!!!!!!!!!!!!
Sounds more like rooster behavior. They start out cuddly and then the hormones take hold and they think they are king of the hill. You could carry a squirt gun with you and give him(her) a blast in the face before he gets to peck you.- that all send him to freezer camp, the sooner the better.