We have just got back from being away for a few weeks on holiday. Our hens were being looked after while we were away, but the person looking after them had not looked after hens before. While we were away we kept receiving messages to say that one hen had died, then another and then another. We have been home for two days now and our hens are not at all well. Out of 22 birds 18 have got runny noses and two are coughing. All of them have got red mites. Some of the hens are lethargic and sit with their eyes closed. Some have pulled their feathers out and some have lost weight. most of them have stopped laying. It is really sad to see. They were so happy and beautiful before. Can any one offer any advice please?