Oh amazing I am so glad
what I would do is get her some bantam lady friends (bantam so they can't hurt her in the same way a chicken her size or bigger could) you could get chicks but their is a chance of a Cockerell and unless she goes broody and thinks they are hers she will hurt/kill the...
Right I had not realised that you were hand feeding her but I would feed her as many times as possible to get 150g of feed into her, she might not like being fed (?)
Good luck
@Miss Lydia @WVduckchick @New duck mommy 2021 @sourland
Hope someone can help, I don't know what todo but if I were in your situation I would take her to a vet but I know not everyone has that option
I send my love and good wishes hopefully she will be okay :hugs :fl