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I have not found any problems with the Erehorn - Twice Rice Cereal
however I have not tried there poppets - corn allergy.
I have two other cereals I use on a regular basis there are: Puffs and
Honey by The Breadshop and a hot cereal, Red Bob's Mill - Creamy Brown
Rice Farina. It is absolutely delicious.
Early on this post somewhat stated that Rice Krispees are gluten-free.
I disagree they contain malt. Therefore, rice krispees cereal and rice
krispees snack treats are not gluten-free.