As with our own dieting woes, the unpleasant prospect of the simple solution — feeding our furry friends less — makes us reach for alternative, quick-fix strategies. Many pet parents have turned to radically new menus. These grain-free, all-meat and raw-food diets are inspired by the meals eaten by wild relatives of our fidos and felixes. But are these diets really better for our pets? Veterinarians and pet nutrition researchers say probably not.