You can start with the yogurt tonight -that's fine.
If you see even the slightest respiratory symptom, consider a good antibiotic like Tylan or LS50, or if the bird's drainage is smelly Sulmet. You can use yogurt with Tylan (tylosin) or Sulmet (a sulfa drug), but not LS50 (lincomycin/spectinomycin).

If you see even the slightest respiratory symptom, consider a good antibiotic like Tylan or LS50, or if the bird's drainage is smelly Sulmet. You can use yogurt with Tylan (tylosin) or Sulmet (a sulfa drug), but not LS50 (lincomycin/spectinomycin).