For knee pain
and chondromalacia you she must go throug the detoxification
therepies of panchakrma and raktmokshana therapy, for this visit your nearest ayurvedic doctor.
Until then give her
tab. Panchatikta ghrita guggula 2 tabs twicw a day
tab. Lakshadi guggula 2 tabs twice a day. This will defenetely give her relief.
For more advice consult me privetely.