C.L.
Enfamil A.R. is what you need to use. It has the rice starch in the formula but ground down so there is no choking risk. That's what we used after trying many many formulas for both my acid reflux kids. The only other formula that was good was Good Start (Made By Carnation but more expensive than the other formulas) and they did very well on that, but when my husband got laid off we were forced onto WIC and they only use Enfamil products. Gentlease he puked on but the A.R. was definately a winner. I would not recommend cereal in bottles ever, feed it by spoon if you need it in her tummy to hold things down. With the A.R. it thickens after it mixes with the water to add weight, in fact I only used 3 scoops in what should have been 4 scoop bottles otherwise it got clumps that would plug the nipples.
Also my Dr. prescribes PREVACID meltables that we break to his size instead of the Zantac.
Good luck!
C.