Before I bath her, I was thinking medicated shampoo ?
She was just spayed and all of a sudden blowing coat like crazy and dandruff that she has never had before ? Please, I would appreciate any hints for treating/bathing her ? 30/16 food is what she is on. Fish oil capsule also a day.

Some dogs drop coat after going under for an operation. I wouldn't change a thing. Just brush her, hose her down, and it should resolve in a week or two on it's own.