Beak and feather disease is a viral infection that primarily affects parrots and other psittacine birds. It is caused by the beak and feather disease virus (BFDV), which leads to symptoms such as feather loss, abnormal feather growth, and beak deformities. The disease can be severe and often results in significant health issues for affected birds. Transmission of the virus occurs through direct contact with infected birds or contaminated environments. Infected birds may show no symptoms initially, making it challenging to identify carriers. There is currently no cure for beak and feather disease, and prevention focuses on good hygiene and biosecurity practices.