The male budgie Tom was heavily affected by the disease. When he arrived in our care, there were no flight and tail feathers left. Besides, he showed bald patches on his head. Severe inflammation of his airways was also present. Fortunately, thanks to antibiotic treatment, it healed rapidly. After his friend Balou died, Tom seemed to be very depressed, I guess because he was grieving for him. A short time later, the poor little guy died as well.