My 4 year old granddaughter out of no where just stated having tics. On April 13, we started the elimination diet. We removed gluten, dairy, corn, soy, processed sugar, chemicals, artificial color and flavoring, preservatives. We are giving her supplements. So far the tics still exist. I am thinking of not waiting the 28 days to reintroduce a food one by one, since it doesn't seem to be a trigger. Help please with your advice.