My hens tend to keep their babies for quite a while. I would've used a pic with younger babies but 2 days after this picture, which was yesterday, Daffodil lost her baby. I came home to find her dead on the floor of the coop. Not sure if someone jumped on her or what.
I had my hen die like that too, our tiniest bantam. I assumed she died of heat stroke, nothing looked wrong with her physically. :(