Indian Runner Molting

[JinxieKat]

Does anyone know how often an adult Indian Runner should molt?

I have a total of eight. Two of them are only 3 months old. One is 1 years old. The rest of them are 2 years old. All of the 2 year olds have molted at least once. However 1 of them, my chocolate, is on her 3rd molt in 9 months. Is this normal? Also, when she does molt she loses all her wing feathers at the same time.

Should I be worried?

Any advice would be helpful.

There is only one drake and he is only 3 months old.

 

[Isaac 0]

Two molts a year for most ducks.