I don't, but my kids have major food allergies, so I know a lot.
Do you think she is restless because she is sensitive to rice, or perhaps because she is hungry.
Rice milk does not have any fat, so a lot of parents with little ones with dual soy-dairy allergies are advised to stay on formula.
Was she on formula? If so, you might want to keep giving her that instead of the rice milk so she gets enough fat in her diet. If not, and you want to start, the best formula that is the most sensitive (but still formula, not neocate) is Alimentum or Nutramigen (if they can tolerate corn.)
My sisters LO is 14 months and still doing formula, but getting bored with the bottle. So, she has been soaking his veggies in Canola or Safflower oil so he gets a little more fat in his diet as he isn't really digging the formula anymore.
Hope that helps.
Sincerely,
M. - Mother and Cookbook Author, 8 Degrees of Ingredients: Mother to Piper 5 (many FA), Theo 2.5 (no FA) and Chester 9 months (many suspeced FA)
www.EightDegreesofIngredients.com