Hello, I am a mom, but I work at a daycare with children 6 yrs old and younger, and of course, some bite. In the course of my work, we have found that children bite for a number of different things. They are scared, hurting about something, frustrated, bored, tired, hungry,is experimenting with her teeth, the list can go on. Examine the situations in which she bites, is she with new people, new situations, threatened, changes in home life, tired, hungry, mad about something? When she bites, make sure the child is ok, let her see you comforting the child and even let her help comfort if the other child is ok with that. Then sit her down and tell her you understand something is bothering her, but it is not ok to bite other people. It hurts. It is also good to have biting toys like blocks and blankets she can go in a corner and use. Punishing with things on her tongue, time outs, and physically retaliating will not help. Your dr. is right, it will take time and it will go away. Have her around children who are older, they will not take it and let her know they do not want to be bitten. Good luck.