The FDA says over and over, they don't KNOW. But the tin foil hats folk are presenting as absolute fact. It may be a few years before there is enough research.
The FDA reminds readers…
“It’s important to note that the reports include dogs that have eaten grain-free and grain containing foods and also include vegetarian or vegan formulations. They also include all forms of diets: kibble, canned, raw and home-cooked.
“Therefore, we do not think these cases can be explained simply by whether or not they contain grains, or by brand or manufacturer.
The Agency goes on to assure dog owners…
“To put this issue into proper context, the American Veterinary Medical Association estimates that there are 77 million pet dogs in the United States.
“As of April 30, 2019, the FDA has received reports about 560 dogs diagnosed with DCM suspected to be linked to diet. Tens of millions of dogs have been eating dog food without developing DCM.”<<