Canker is a protozoan disease that is the greatest killer of the pigeon diseases. It is found in domestic and wild pigeons and doves caused by a microscopic protozoan which is flagellated and, therefore, mobile. It can be transmitted from one bird to another usually through the drinking water, and parent birds can infect their young through milk feeding.
Clinical signs
A swelling in throat and cheesy growth in the mouth are certain signs of canker.

Canker (pharyngeal form)
Treatment :
All forms of canker can be treated if found early. Ridzol Soluble Powder For flock treatment in drinking water. or Ronidazole Tablets for individual treatment.