Omg! Not only unprofessional comment, but he could get someone killed with advice like that. You did the right thing taking her into the ER, any child vomiting for over 48hrs is supposed to be given IV fluids! (my SIL is a Paediatric nurse and I'm studying to be one)

Each of my toddlers have been 12kg and over at 12months, it's perfectly normal.

Please do report him before he causes someone else damage.