Fowl pox is a viral disease that affects chickens and other bird species. It is caused by the Fowl pox virus, which is part of the Poxvirus family. Here are some of the symptoms of Fowl pox in chickens:

1. Cutaneous (skin) form: The cutaneous form of Fowlpox is characterized by the development of raised, wart-like lesions on the unfeathered parts of the chicken’s body, such as the head, neck, and legs. The lesions may be yellow, white, or gray in color and can become scabby or ulcerated over time. In severe cases, the chicken may experience difficulty breathing due to the growth of lesions in the throat and windpipe.
2. Diphtheritic (wet) form: The diphtheritic form of Fowlpox affects the mucous membranes of the chicken’s respiratory and digestive tracts, leading to the formation of grayish-white plaques or nodules. The chicken may experience difficulty breathing and swallowing, and may produce a foamy discharge from the nostrils.
3. Combination of cutaneous and diphtheritic forms: In some cases, chickens may experience a combination of the cutaneous and diphtheritic forms of Fowlpox. This can result in both skin lesions and respiratory symptoms, which can be severe and potentially fatal.

Fowl pox is a highly contagious disease that can spread rapidly through a flock, especially in crowded or unsanitary conditions. There is no specific treatment for Fowl pox, but supportive care such as providing proper nutrition, hydration, and keeping the affected chicken in a clean and comfortable environment can help improve its chances of recovery. Vaccination is the most effective way to prevent Fowl pox in chickens, and it is recommended for all flocks.