Feather mites--how long until the tail feathers recover?

[aart]

Ok. Hope folks see this.
See my two other threads on this issue. Been trying to figure this one out for a while now. I need help pretty please!

https://www.backyardchickens.com/threads/help-my-americauna-has-feather-mites.1313946/#post-21416654

https://www.backyardchickens.com/th...long-until-the-tail-feathers-recover.1318358/

Starting multiple threads just spreads the info all over....and folks may have a hard time following.

 

[Mo'sMenagerie]

Fingers and toes crossed, treated everyone with ivermectin last night.