Sorry I meant red mite. Not red spider mites. My mistake. I do know what infestations of mites can do. There is a lot of different advice out there. I have heard of permethrin to treat lice or mites but didn't realise that it was in ant powder. That is why I asked was it safe. What would be the best thing to kill and deter red mites.
All the things being suggested here for the fowl mites will also kill red mite....permethrin in the coop, run and on the birds. Once you are happy that you have eradicated any existing mites, DE can be used as a preventative. As mentioned here, it's no good for an existing infestation. It works through causing microscopic damage to the exoskeleton of the bug (any bug!) which causes dehydration and eventual death. It DOES kill them but it takes several days for it to take affect and in an infestation situation, there are new hatches and new bugs at an alarming rate so the DE simply doesn't 'keep up' with the population. You can use it in the dustbath of 'clean' birds too xx