I posted a couple of weeks ago about my 6 year old nephew who keeps chewing everything. My sister says she has just discovered that his second lot of teeth are coming in behind his baby teeth at the bottom of his mouth (with no sign of the baby teeth being wobbly yet). She is taking him to the dentist, but wondered if anyone had experienced this before. What happened? How did it effect the child and could this have been the cause of him chewing everything before?