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The notion that every dog or cat should be neutered at 6 months isn't based on evidence, says veterinarian Brennen McKenzie, author of The SkeptVet blog. It depends on the breed and other factors. Talk to your vet, he advises, about pros, cons and timing. katoosha/iStockphoto/Getty Images hide caption

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Drugstore shelves carry medications approved by the Food and Drug Administration as well as unregulated supplements and homeopathic remedies. Christopher Dilts/Bloomberg via Getty Images hide caption

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Christopher Dilts/Bloomberg via Getty Images
Katherine Streeter for NPR

FDA Ponders Putting Homeopathy To A Tougher Test

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