You might try giving her panacure for 5 days in a row, that will kill any worm that is known to get in chickens. I have seen the dose described as 'pea sized' for each bird.
I know a lady that rescues horses...... She had a nearly starved mare give birth to a foal. The mare was slowly gaining weight after being wormed. But, the goal just was not doing as good. The vet advised her to worm the foal, with just a small dosage. The foal struggled and caused the entire dose in the syringe to be administered. The vet told her not to worry, panacure was very safe it wild not hurt the foal.
There were no side affects.....
I know a lady that rescues horses...... She had a nearly starved mare give birth to a foal. The mare was slowly gaining weight after being wormed. But, the goal just was not doing as good. The vet advised her to worm the foal, with just a small dosage. The foal struggled and caused the entire dose in the syringe to be administered. The vet told her not to worry, panacure was very safe it wild not hurt the foal.
There were no side affects.....