Ever wonder why your dog has become more aggressive after eating a piece of meat or high protein dog food? While protein is important for dogs, studies show that some dogs are fed too much protein, causing them to become aggressive. Unless your dog is under a year old, pregnant, nursing, or an actively working dog such as a herding, sled, or hunting dog, a high protein diet is unnecessary and can cause dominance and territorial aggression. While studies have shown that puppies under a year old need a diet with 28% protein content and working dogs require a diet with a protein content of 32%, chances are your dog needs less.
Medical studies have determined that feeding dogs lower protein diets can help curb both dominance and territorial aggression problems. In some studies, besides switching to a lower protein diet, tryptophan was given as a supplement. Additives and fillers have also been shown to have a negative impact on dog aggression. If your dog is displaying aggression consider changing your dog to a lower protein diet, many veterinarians recommend about 18% protein, and choosing premium dog foods with little or no additives and fillers.