Rural Gardening: Please can you help me, 1 by weimac

weimac wrote:
one of our chicken houses that keep the 12 weeks old chicks in i notice one of the chickens going bald round the kneck, then more of the baby chicks have it to .some have got a balde patch on ther eye but some on the chest , Please can anyone help how and what to do . thy are free range now in the garden but no othere chicken house has been efected by it . Thank you very much I hope you can see with the photo.
Weimac