The infestation of lice or mites requires more than just treating the birds with something effective. The birds are likely stressed and uncomfortable, so you need to treat premises in addition to birds, or the problem will persist. Something effective needs to be used in that case, such as what is recommended in this article:We have been dusting with poultry powder (permethrin) every 5 days to rid a heavy louse infestation so that might take care of the mites too. I did not de-worm them as I read you cannot eat the eggs afterwards and I have lots of customers, but if you think it might help the girls I will do it!
Do you think it is possible that the coconut oil is encouraging them to nibble on their own feathers?
If this is a habit, is there any way to stop it? I have not read about any successful methods.
http://edis.ifas.ufl.edu/ig140