I'd noticed that Betty had some scruffy feathers around her neck for a few weeks, but had a look and the skin didn't look inflamed/red, so thought it was nothing. However I've had another look at her today and she has a MASSIVE bald patch that goes up and all around her neck. The feathers look almost as if they have been broken off at the base of the shaft. I have noticed some tiny white mites crawling around her feathers (feather mites?) so have dusted her and the other chickens with DE. Any ideas on the cause of the bald patch? Also do you have any suggestions for anything stronger other than DE? I dust them with this regularly and yet there are still mites, so I need to try something else. I've heard that you can use Frontline - which type/dosage? (I'm in the UK) Thanks in advance!