Thrush or Sour Crop
Thrush is a common acute or chronic fungus infection especially of the digestive tract. Other names for this disease are mycosis, soor, muguet, sour crop.
Poor growth of young pigeons, accumulation in the crop; whitish fungal growths in the throat.
Separation of affected birds. Administration of Nystatin (veterinary) and high levels of Vitamin A.
Clean lofts help prevent this infection.