Personality switch?

[BroodyChook]

My youngest pullet, Maeve, has suddenly turned from a lovely, friendly, sweet hen into a pecky, aggressive monster. She is a pekin bantam, approx 20 weeks old, and has always loved sitting on my lap for a fuss. All of a sudden, literally in the last few days, she has started pecking me if I try to touch her, and even charging me with all her feathers up. Do chickens have puberty? Is she perhaps coming into lay and a bit mental? Does anyone have any experience of crazy chickens?

[Bumblebooz]

Very strange, possibly in need of an ASBO

[BroodyChook]

I'm hoping that it's some odd hormonal thing which means she'll soon be coming in to lay.