Watch for any reactions. 4- After that, feed 2 tablespoons of single grain oatmeal + 1 1/2 ounces of formula once a day. ALSO, continue feeding rice cereal + formula once a day... so he will be eating solids two times a day. I usually did one time mid morning and the second at night to space it out. 5- Feed with the oatmeal (+ rice cereal for 2nd feeding) for 5 days.