I recently read an article that stated that feeding grain free food long term might cause heart problems, because it causes deficiency of taurine? Should I be feeding it? My grain free is not fancy, just diamond Nutra Nuggets beef and pea. I have two dogs allergic to grass, we got by for a long time on Diamond Lamb and rice but then Lady started getting ear infections so we switched to grain free fish, then later Nutra Nuggets. Brandy gets yeast infections between the toes of her right front foot sometimes, so I started feeding grain free to everyone. Should I not be doing this? They also get meat and vegetables sometimes, but I am careful what they eat as much as I can be with dogs who are outdoors a lot on a ranch.