HI,I've had 3 quail die over the last 6 weeks, they suddenly grow thin (breast bone showing), and appear feather pecked. Then suddenly die. They are only 6 months old and |'ve no idea what the problem is. I've recently acquired red mite, and wonder if they may have weakened the birds but seem to have got almost on top of it, finding the occasional small group of around 10 mites. I'm using spray and powder regularly to get on top of this. Only one or two birds seem affected at a time, not the whole flock. Can anyone help?