What symptom is associated with the disease known as frounce?

Frounce, also known as canker, is a disease primarily affecting birds of prey and is caused by a protozoan parasite, specifically Trichomonas gallinae. A key symptom of this disease is the presence of flat, cheesy growths in the mouth and throat of the affected bird. These growths can lead to difficulty in eating and may cause other complications if left untreated.

The nature of these cheesy lesions is typical; they appear as yellow or white pasty patches and can be found on the lining of the mouth, esophagus, and sometimes even in the crop. This symptom is distinctive and is a critical factor in diagnosing the condition.

Other symptoms associated with frounce may include lethargy or a general decrease in activity levels, but the signature symptom remains the growths in the mouth, which are prominent and provide a clear indicator of this particular disease.