My Budgie Is Constantly Fatigued And Seems In Discomfort – what Can I Do?

Hi all,

I have two budgies, a 7-year-old male (pictured) and a 9-year-old female. Neither of them have ever had any serious health problems until this week. Both have always been very active and energetic. The male seems tired at all times, fluffing up his feathers and squeezing his eyes shut for hours and hours on end. He is eating and drinking, and while he had diarrhoea for a day or so this has now passed and his temperament remains unaltered. When I put a heat lamp over the cage, he gravitated to it instantly, and often stays underneath it for hours without moving. What can I do, and does anyone know what he has?

Thanks for your support!