[theBCnut]

Probiotics go bad fairly quickly so I would suspect that those are no longer any good, they won’t do any harm to try them, they just might not help.

Don’t use a vinegar spray!

The idea is to get stuff that is sitting on the surface of the coat wiped off, spraying will carry it deeper. If you are actually going to give her a rinse, then it’s fine, but there really isn’t must point in doing both.