Conversation

a friend of mine works as a pet-sitter, and few days ago she wrote a negative feedback about a huge scam from a company that sells dogs with fake pedigrees (fostering the reproduction of dogs with genetical diseases, etc).
Now this company started slanders her over social profiles.
She seems to be up to go ahead and go with layers if necessary, tough she has not so much money and experience meanwhile the company is quite big and seems used to manage with all this shit.
Any suggestion?