You were giving the golden laced pullet Corid which is a thiamine blocker, then you gave the pullet lots of Nutri Drench which contains thiamine.
The Nutri Drench is causing the Corid to be ineffective. Stop the Corid and Nutri Drench and get the pullet started on a Sulfa drug or Toltrazuril as stated by @Eggcessive and @coach723 or you're going to lose her.
The Nutri Drench is causing the Corid to be ineffective. Stop the Corid and Nutri Drench and get the pullet started on a Sulfa drug or Toltrazuril as stated by @Eggcessive and @coach723 or you're going to lose her.