There are new concerns with grain-free diets for dogs. Such foods lack taurine, a sulfur-containing amino acid important in the metabolism of fats. This may lead, particularly in small dogs, to life threatening heart disease.
According to Dr. Daniel Teich, medical director at The District Veterinary Hospital:
“Grain free diets, or diets containing large quantities of legumes, may be associated with the development of heart failure in some dogs. The exact cause is unknown, but we are concerned about the observed link between the two. At this time we do not recommend being on a grain free diet unless there is a medical reason to be on such a diet. “
If a grain-free diet is something your dog requires, consult with your veterinarian about adding a taurine supplement to their daily food.