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Hens sit in cages inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

Hens sit in cages inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

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Eggs sit in cardboard packing trays as they pass through a sorting machine in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

Eggs sit in cardboard packing trays as they pass through a sorting machine in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

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Eggs sit in cardboard packing trays ahead of boxing inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

Eggs sit in cardboard packing trays ahead of boxing inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

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Freshly laid eggs pass along a conveyor inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

Freshly laid eggs pass along a conveyor inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

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Freshly laid eggs pass along a conveyor inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images

Freshly laid eggs pass along a conveyor inside an egg farm in the West Flanders region of Belgium, on Thursday, Aug. 10, 2017. The U.K. raised its estimate of eggs contaminated by the unauthorized pesticide fipronil, with the outbreak believed to have affected some products made by major supermarkets. Photographer: Jasper Juinen/Bloomberg via Getty Images