The staph infection in her feet and legs has somehow effected her ability to walk and roost, probably due to pain and/or stiffness in joints or muscles. I would continue the warm epsom salt baths which bring temporary pain relief if that's the case. Or perhaps get her started on Meloxicam.
http://www.poultrydvm.com/drugs/meloxicam
DE is a waste of money and will not prevent nor treat internal or external parasites. Vinegar does not prevent internal parasites neither.
I recommend purchasing Valbazen and orally dosing all your chickens 1/2ml orally using a syringe without a needle, repeat again in 10 days. It will take care of any worms your birds may have.
http://www.poultrydvm.com/drugs/meloxicam
DE is a waste of money and will not prevent nor treat internal or external parasites. Vinegar does not prevent internal parasites neither.
I recommend purchasing Valbazen and orally dosing all your chickens 1/2ml orally using a syringe without a needle, repeat again in 10 days. It will take care of any worms your birds may have.