Organic West, which supplies milk from 55 farmers, didn't sell organic whole milk powder to any infant formula maker besides ByHeart, Van Ryn said. Its plant in Nevada processes about 1.5 million pounds of raw milk daily into 250,000 pounds of whole milk powder. Organic West subsequently sold the milk powder to ByHeart. ByHeart officials declined to identify the source of those milk powder samples. Botulism spores have been found in infant formula in the past, but this is the first large outbreak linked to the product.