Mites? Or something else?

[Island]

Today I noticed that one of my goats had some white crusty spots on both of her ears.
I didn't see them there yesterday, but maybe I just didn't notice them?

I sprayed her and her sister with a permethrin solution just in case it is mites, what else should I do?

 

[Baymule]

Sounds like you are on top of treatment.

 

[Island]

Sounds like you are on top of treatment.

Does it look like mites? I know the pictures aren't great, sorry about that.