Possible Link Between Grain-Free Dog Food and Heart Disease, F.D.A. Says The number of dogs on the popular diets who have developed enlarged hearts is small but concerning. Researchers are beginning to investigate causes. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Yellowstone volcano: Who is tracking the supervolcano during US Government shutdown?Q&A: Clean, Abundant Energy: Fusion Dreams Never EndCalifornia Adds Its Clout to States Battling High Drug PricesMemorial Sloan Kettering Curbs Executives’ Ties to Industry After Conflict-of-Interest ScandalsSeals Are Stranded in a Canadian Town, and People Wonder What to DoMichael Atiyah, Mathematician in Newton’s Footsteps, Dies at 89