Officials said the team is concentrating on more than the two companies believed to have exported the melamine in wheat flour mislabeled as wheat gluten and rice protein concentrate.

CNN: FDA: Melamine-tainted poultry, fish safe for humans

Whole Vine produces grapeseed oil and grapeseed flour from vineyard byproducts, and gluten-free cookies, too.

WSJ: From Grief to Growth at Jackson Family Wines

No flour, no wheat, no gluten.

FORBES: Cal-a-Vie Reverie

Ingredients: old fashioned oats (gluten-free rolled oats), coconut, macadamia nuts, sliced almonds (cashews), soy flour, cinnamon, wheat germ, maple syrup, dry milk, safflower oil, and dried cranberries.

FORBES: Snack Attack: By Hand Granola