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Latest information from Dog Food Advisor on Grain Free versus Grain Inclusive diets for dogs.

• “In 2018, the U.S. Food and Drug Administration, acting on input from a group of veterinary researchers, began investigating whether the increasing popularity of grain-free dog foods had led to a sudden rise in a potentially fatal heart disease in dogs, dilated cardiomyopathy.

• “Four years later, the FDA has found no firm link between diet and dilated cardiomyopathy. Nor has it rejected such a link, and the research is ongoing. Publicity surrounding the suspected link, nevertheless, has driven down the once-promising market for grain-free dog foods.

• “Furthermore, a tangled web of pet food industry funding and interests may have influenced the origin, data collection and course of the FDA study, according to an examination of internal FDA records and extensive reporting.

• “A six-month investigation by 100Reporters has found that veterinarians who prompted the FDA to consider diet have financial and other ties to the leading sellers of grain-inclusive pet foods. Additionally, agency records show that for the initial study, some vets were instructed to submit only dilated cardiomyopathy (DCM) cases that implicated grain-free, “exotic” or “boutique” pet foods. Suppliers of ingredients used in grain-free dog foods have also exerted pressure on the FDA to protect their market.”