Are grain-free diets necessary for dogs?
Written by
Elin Eriksson
Reviewed by
Prof. David Walsh, Ph.D.Grain-free diets are medically necessary only in dogs with confirmed grain allergies. These comprise less than 10% of dogs. Most dogs can easily digest grains and derive significant nutritional benefits from whole grains like oats and barley, which contain important B vitamins, soluble fiber, support digestive health, and provide energy for sustained activity throughout the day.
Nutritional Advantages
- B vitamins: Support metabolism and nervous system function
- Soluble fiber: Regulates blood sugar and bowel movements
- Antioxidants: Fight cellular damage from free radicals
- Minerals: Iron magnesium and selenium for overall health
Digestive Benefits
- Prebiotic fibers: Feed healthy gut bacteria populations
- Starch digestion: Enhanced by amylase enzymes in dogs
- Satiety control: Helps maintain healthy weight management
- Dental health: Crunchy kibble textures reduce plaque
Risks of Unnecessary Elimination
- Taurine deficiency: Linked to grain-free legume-heavy diets
- DCM risk: Dilated cardiomyopathy in susceptible breeds
- Fiber deficiency: Leading to constipation issues
- Cost increase: Premium pricing without proven benefits
The FDA investigation found that some grain-free diets could be associated with dilated cardiomyopathy, especially in breeds such as Golden Retrievers and Dobermans. These diets frequently substitute legumes for grains, which can impair the absorption of taurine. I have observed improvements in patient cardiac function after reintroducing them to a nutritionally balanced and complete grain-rich diet.
For dogs needing grain-free formulations look for those with animal-based proteins as the first ingredient with limited legumes as well. Ensure they contain taurine supplements and omega-3 fatty acids. Have the veterinarian monitor the heart closely on an annual basis. Gradually transition to new food over a 9-10 day period to minimize any gastrointestinal difficulties that may develop.
You should always talk to your veterinarian before taking away grains. They conduct allergy tests that pinpoint the specific cause of the allergy, rather than eliminating an entire food group. Many of the skin problems attributed to grains are caused by proteins in the diet, such as those found in chicken. A proper diagnosis can free you of the unnecessary restrictions of a diet that would be needed otherwise to obtain adequate nutrition.
Read the full article: Dog Food Ingredients: The Essential Guide
