What are you feeding Q? Does she have grit available?
Mine seem to prefer whole soaked wheat, my poorly hen is eating a bowlfull now, but the others, cockerel especially, will peck at her in their cage (cage in polytunnel with access to outside), so she eats and sleeps in a pet carrier. Yet OK outside.
Moulting can highlight problems but not for 10 months?
Surprised she's laid eggs if she is so weak? Was she worse after laying eggs?