Hi, there are a few signs that might give you a good understanding if your flock has mites.
1.) your birds are missing feathers ( it looks like they are going through somewhat patterned baldness) feathers may be plucked from their back or underneath their wings or by the vent.
2.) check underneath their wings and by their vents for mites, that it where bird mites like to take shelter on the bird itself. They are quite small and resemble tiny blackish-red dots that move.
If your birds do have mites clean out their coop and after you do sprinkle a product called diatomaceous earth food grade it has to be food grade in the coop. Also use the diatomaceous earth and apply it under the birds wings and vent area or wherever you see baldness. This product is a great natural mite killer that is good for your flock. Also supplement a vitamin in the birds water just to give them a boost of energy. Lastly supply more protein to the birds diet, when chickens have mites they need lots of nutrients to stay alive. I hope this helps i'm sure more people will chime in on how you can deal with those pesky parasites.
