Red mites in my chicken coop
I regret to tell you that the red mite in Poultry is not the same pest as red spider mite on plants. It is a different pest entirely and the spider mite predators will not have fed on it. You need to use a product for red mite control, which there are plenty on the market. Some use Pyrethrum but the product Harrod Horticultural sell is not permitted for this use. If you try a pet shop or outlet selling poultry products like coops etc, they often carry products for controlling red mite on chickens. I know hygiene is also important in the control of this pest by cleaning the chicken coops regularly.
I hope this is of some help.