Thanks Dawg53...on both posts.
I'm attaching a few images to see if maybe you guys think there are any other issues I need to address.
This is the worst of the two black sexlinks. They at least have energy which is encouraging. Dusted them lightly by hand yesterday and put some olive oil on the bald spots. I may be too hopeful but I THINK I see the start of new feathers coming in.
Below is the Silkie I found the single louse on. Are they really supposed to look this crazy with the curly feathers or is she perhaps the original bearer of the lice? The other Silkie is calmer and less wild/ un-kept (This one is so SPASTIC my buddy who gave her to me named her "Tweak" which is very fitting)