Suggest Remedy For Aversion To Solid Food In A Child

My son who will be 4 this coming Monday March 9th will not eat. He hasn t eaten anything since Sunday Feb 22nd, but he has been drinking. He drinks PediaSure, juice, milk, water and he was eating Gogurts, but I ran out of them so fast and took him the ER Monday night they said stop spoiling him with the pediasure and gogurts. So now he is just drinking juice and water and milk. The ER doc said he is fine he will eat when he is hungry. He told me last night that his stomach is growling, but he refuses to eat I have tried everything! Please help me I am going to lose it soon! Amy