Yes, Mable's belly & inner thighs are bald too...she looks terrible! She had been living with an aggressive hen...an Easter egger who plucked her feathers out - I'm wondering if she's mimicking the behavior on herself. Or if it's a stress-induced thing - because she changed homes. Or if it's her first molt (she's 13 1/2 months old). But my Australorp began molting at the end of the winter & she followed the textbook pattern from the neck down...so, I don't know. I'm relatively new at this...got my first chickens a little over a year ago. And I worry about my 5 little hens incessantly!