Loss Of Feathers
Moulting is normal for budgies, and they lose feathers to make room for new ones to grow. The most obvious sign your parakeet is molting is that it looks ragged, with many dropped feathers littering the bottom of the cage.
In the wild, budgerigars will have an annual moult but with the central heating within our homes it is not unusual for budgies to continually lose a few feathers – this is known as a trickle moult.