When starving the poop becomes watery and shows a green colour caused by bile, but if she has been eating well now, the greenish colour should soon be replaced by normal looking poop.
You could wait for another day or two to see if the poops will change to normal and feed her some Moro Carrot soup which helps to restore gut balance and eliminates harmful bacteria:
https://www.ency123.com/2015/09/natural-remedy-for-diarrhea-professor.html
But instead of the recommended 3 grams of salt, only use 1,5 grams as chickens kidneys are very sensitive to salt.
Feeding her some scrambled eggs will help her also to regain strength .