I have a beautiful 17 month old son who was put on Pulmicort at 4 months old. At the age of 6 months he started seeing a pulmonologist, which started him on Quvar (another inhaled steroid). My son eats all the time but is actually in the 50th percentile for weight at his age. We have not had any problems with excessive weight gain or any problems with his teeth due to the inhaled steroids. If you are not seeing a pulmonologist I would suggest that you do. There may be other medications out there better suited for him. I hope that all goes well for you!