Unfortunately, exhibition budgies are usually sick birds from the moment they are born. They often have diseases such as tumors and cysts. They also have heavier bodies than normal budgies. A heavier body causes a lack of movement and also prevents fly.
Breeding the exhibition budgies is a complex and long process. Besides, there is no single way to breed these budgies. Although the breeders control the whole process, breeding has always been a chance factor.