Oh and one other thing. 
One of the symptoms of Depluming Mites can be seen on the feather itself. If you have ever seen horizontal thin bars on the tail feathers or primaries...looks like very tiny pin holes horizontally across the feather....there may be several of these lines up and down the feather...this is caused from Depluming Mites. These tiny holes cause the feather to be thin and break easily at these places.
Just because you see these lines doesn't mean you have a heavy infestation, but that the bird is having a bit of an over load of these mites. Possibly the bird is sick or weak in some way. Healthy up the bird and at the next molt you shouldn't see these lines appear on the feathers.

One of the symptoms of Depluming Mites can be seen on the feather itself. If you have ever seen horizontal thin bars on the tail feathers or primaries...looks like very tiny pin holes horizontally across the feather....there may be several of these lines up and down the feather...this is caused from Depluming Mites. These tiny holes cause the feather to be thin and break easily at these places.
Just because you see these lines doesn't mean you have a heavy infestation, but that the bird is having a bit of an over load of these mites. Possibly the bird is sick or weak in some way. Healthy up the bird and at the next molt you shouldn't see these lines appear on the feathers.