False moult is not a disease ! It is caused by a sudden change: Light, temperature, draft or stress.
2. The effects of a false moult
The zebrafinch enters a period of out-of-season moulting which will weaken it. To be avoided during breeding or competition period.
The bird victim of a false molt will need a supply of vitamins and minerals to help regrowth of the feathers.
3. A remedy used by breeders
To remedy this false moult, there is a method used by breeders which consists of letting a peeled and cut onion macerate in a liter of water for 3 to 4 days (protected from light).
Then, put a tablespoon of the juice obtained in a liter of water and distribute in the drinking trough for a week, renewing this mixture every day.