Understanding Diet, Ingredients, and Heart Health in Dogs

There has been significant discussion in recent years about the relationship between certain dog food formulations and heart health. Much of the attention has focused on grain-free diets and their potential association with a condition known as dilated cardiomyopathy (DCM).

However, the topic is complex and continues to be studied by veterinary researchers, nutritionists, and regulatory agencies.

Understanding how ingredients and formulation methods differ among dog foods can help pet owners make informed decisions about nutrition.

What Prompted the FDA Investigation

In 2018, the U.S. Food and Drug Administration (FDA) began reviewing reports of dilated cardiomyopathy in dogs eating certain commercial diets. Many of the diets reported during that review shared some common characteristics.

According to FDA updates and related research:

• Many reported diets were dry kibble products

• A large number contained peas, lentils, or other legumes among the main ingredients

• Some relied on plant-based protein concentrates as part of the formulation

The FDA’s review emphasized that the situation is complex and that multiple factors may influence heart health, including genetics, ingredient composition, and nutrient balance. Research in this area is ongoing.

Protein Sources and Canine Nutrition

Dogs require adequate amounts of certain amino acids and nutrients to support normal body functions. These nutrients may be provided through a variety of ingredients depending on the formulation of the food.

Animal-based ingredients naturally contain nutrients such as:

• Taurine

• Carnitine

• Vitamin B12

• Certain essential fatty acids

These nutrients play roles in normal metabolic processes throughout the body.

Different dog food formulations may obtain these nutrients from various ingredient sources or through supplementation, depending on how the diet is designed.

Ingredient Composition in Modern Dog Foods

Many commercial dry dog foods rely on combinations of ingredients that may include:

• Animal proteins

• Plant-based proteins

• Grains or legumes

• Added vitamins and minerals

Processing methods and ingredient proportions vary widely among brands and formulations.

Because of this variation, some pet owners choose feeding approaches that emphasize animal-based ingredients and minimally processed foods.

Digestive Health and the Gut Microbiome

Another area receiving increasing attention in canine nutrition research is the gut microbiome—the community of microorganisms that live in the digestive tract.

Researchers continue to study how diet composition may influence the balance of these microbial populations.

Changes in microbial balance are sometimes referred to as dysbiosis, a term used to describe shifts in the proportions of microbes within the digestive tract.

Many factors may influence the microbiome, including:

• Diet composition

• Environmental exposures

• Stress

• Medications

• Lifestyle factors

Because these factors interact, maintaining digestive balance often involves multiple aspects of care.

Diet Composition and Digestive Function

Dogs evolved as scavenging carnivores and are well adapted to diets rich in animal proteins and fats.

Modern dog foods may vary significantly in carbohydrate content depending on the formulation. Research continues to explore how different ingredient compositions may influence digestion and microbial populations in the gut.

Some dog owners prefer feeding approaches that emphasize animal-based ingredients and lower levels of starch, while others choose more traditional commercial diets. Each approach reflects different nutritional philosophies and feeding practices.

The Prey Model Raw Feeding Philosophy

One feeding approach that has gained attention among some dog owners is prey model raw feeding, commonly described as an 80/10/10 ratio:

• 80% muscle meat

• 10% raw edible bone

• 10% organ meat

This approach focuses on whole animal ingredients while minimizing heavily processed components.

At RawFedK9, our recipes follow this prey-model raw structure and are made with whole animal ingredients without grains or fillers.

Choosing the Right Diet for Your Dog

Nutrition is only one part of overall health. Factors such as genetics, environment, activity level, and veterinary care all contribute to a dog’s well-being.

When selecting a diet, many pet owners consider:

• Ingredient quality

• Level of processing

• Protein sources

• Personal feeding philosophy

Because every dog is different, dietary choices may vary based on individual needs and preferences.

A Thoughtful Approach to Canine Nutrition

As research in canine nutrition continues to evolve, many pet owners are exploring a variety of feeding options—from traditional kibble to fresh or raw diets.

Understanding how ingredients, processing methods, and formulation philosophies differ can help pet owners make informed decisions about their dog’s nutrition.

At RawFedK9, our goal is to provide minimally processed, animal-based foods designed around prey-model raw feeding principles.