how does one...

[silkiemother]

how does one get rid of the white stuff left on a bird after the bird has successfully been treated for mites? my black silkie rooster had mites a while back and he was treated for them but the white stuff remained on his butt fluff.

 

[Skippersnh]

i could be wrong but i think that white stuff is mite eggs

 

[coach723]

Pictures would help. White fluff at the base of feather shafts may be lice nits/eggs.
If you did not clean out and treat the coop as well as the bird(s) then it's probably just going to keep recurring. What did you treat with, and how long ago? Usually it will take at least two to three treatments for the birds and the coop at 7 day intervals to make sure you've gotten them all (unless you use Elector PSP).
https://the-chicken-chick.com/poultry-lice-and-mites-identification/

 

[silkiemother]

its not just at the base though, its all over his bum fluff till the top of the feather fluff and it comes off a little bit if I brush him

 

[Pennys Mama]

We need a picture of his butt fluff!!!
(Unusual request under normal circumstances)

 

[coach723]

As close as you can get and in focus. Sometimes a verbal description just isn't enough.

 

[silkiemother]

okay I will get a pic of his butt fluff if he lets me he doesn't like his manly dignity ruined by being seen by the public being a mommies boy​

 

[Pennys Mama]

okay I will get a pic of his butt fluff if he lets me he doesn't like his manly dignity ruined by being seen by the public being a mommies boy​

Tell him to "MAN UP, or it's gonna be nit picking your butt feathers, & say CHEESE!".