One of my gees has hurt my duck she is missing most of her back feathers

[Summer Snow]

How do i help her i put bag balm on her gave her some electrolytes what else can i do flr the poor girl

 

[sourland]

Welcome to BYC. Sorry for the circumstances. Try to keep her as warm and dry as is possible. The East coast is supposed to get the coldest weather of this winter starting this week end. Also keep the geese away from your other birds - sounds as if they are becoming territorial now that breeding season is approaching.