My son does not want to eat, he says he is disgusted with the food ...

I HAVE A 3 YEAR OLD SON AND HE DOES NOT WANT TO EAT, SAYS HE HAS FOOD NOUS, I PLACED HIM ON THE CRECHE, TO SEE IF ANOTHER ENVIRONMENT HELPED HE EAT, NOT ON THE CRECHE HE EATS. YOU CAN HELP ME OR INDICATE A PROFESSIONAL FOR THIS CASE. THANK YOU VERY MUCH IN ADVANCE!