Best rice cereal/oatmeal brands?

Kailey Suzanne • Hazel Suzanne 02.18.18 - Colbie Margaret 08.09.19 - Baby girl #3 due 05.28.21

Best rice cereal/oatmeal brands? Little girl isn’t gaining enough at 4 months EBF and ped recommended adding some substance to her diet. What kind should I purchase?