Homemade Dog Food vs Commercial Dog Food: Which Is Healthier? (Vet Explains)

Every pet owner wants the same thing; a long, healthy, happy life for their dog or cat.

Yet, one of the biggest questions I hear in my consultation room is:

"Doctor, what's better? Homemade food or commercial pet food?"

The internet is full of opinions. Some people believe kibble is the perfect diet because it is labelled "100% complete and balanced." Others believe every commercial food is harmful and that homemade meals are always healthier.

The truth lies somewhere in between.

As both a practicing veterinarian and a veterinary nutritionist, I've spent years treating pets suffering from chronic diseases while also studying how nutrition influences health. One thing has become increasingly clear to me:

Food is far more than calories. It is information for the body. Every meal influences the immune system, metabolism, gut health, skin, joints, organs, and ultimately, longevity.

So let's look at homemade diets and commercial food through the eyes of science, clinical experience, and common sense.

Why Commercial Pet Food Were Created

Commercial pet food were never designed simply to feed pets.

They were designed to feed millions of pets.

That means manufacturers have several goals:

- Long shelf life

- Consistent quality

- Safe storage

- Affordable production

- Easy transportation

- High palatability

- Nutritional adequacy

These are not bad goals. In fact, they have made pet nutrition more accessible and helped prevent many nutrient deficiencies.

However, producing food on such a massive scale requires compromises.

Ingredients must remain stable for months or sometimes years. The food must survive transportation, varying storage conditions, and still look and taste appealing when opened.

This is why commercial food often rely on intense processing techniques and added nutrient synthetic premixes to create a consistent product.

Understanding the Different Types of Commercial Food

Commercial diets generally come in three forms:

- Dry food (kibble or pellets)

- Wet or canned food

- Semi-moist diets

Each has advantages and disadvantages.

Dry kibble is convenient, economical, and has a long shelf life.

Wet food generally contains more moisture and is often more palatable.

Semi-moist diets are designed for convenience and taste.

Regardless of the type, all commercial food undergo processing to improve safety, stability, and consistency.

What Really Happens During Kibble Production?

Most dry pet food are made using a process called extrusion.

During manufacturing, ingredients are:

- Ground into fine particles

- Mixed together

- Exposed to high temperatures

- Subjected to pressure

- Forced through an extruder

- Dried

- Sprayed with fats and flavour enhancers

This process improves food safety and digestibility, but it also affects some naturally occurring nutrients.

Certain vitamins, enzymes, antioxidants, and other heat-sensitive compounds can be reduced during processing.

This often leads to an important question;

"If Nutrients Are Damaged, Why Does the Label Still Show Them?"

This is one of the most misunderstood topics in pet nutrition.

After processing, manufacturers typically add vitamin and mineral premixes or formulate recipes to account for expected nutrient losses. These supplements help ensure the finished product meets nutritional standards established by regulatory bodies.

Therefore, when a label states that the food contains specific vitamins and minerals, those nutrients are often present because they have been added or adjusted during formulation but not necessarily because they remain in the same form or amount as they were in the original raw ingredients.

This is one reason a food can legitimately be labelled as "complete and balanced."

Does "Complete and Balanced" Mean Perfect?

No! 

It means the food supplies the required essential nutrients according to established nutritional standards for a particular life stage.

That is an important benchmark because it helps prevent deficiencies.

However, nutritional adequacy is only one part of the picture.

Questions that many veterinarians and researchers continue to explore include:

- How much processing is ideal?

- Does the source of nutrients matter?

- Can whole-food ingredients offer benefits beyond meeting minimum nutrient requirements?

- How do different dietary patterns influence health over a lifetime?

These are active areas of research.

What I See Every Day in Practice

Every day I treat pets with:

- Chronic diseases

- Recurring infections

- Intolerances

Nutrition is rarely the only cause of these conditions. Genetics, body weight, environment, infections, exercise, and preventive healthcare all influence disease risk.

However, diet is one factor that affects the body every single day.

In many patients, improving nutritional quality forms an important part of long-term disease management alongside appropriate medical treatment.

Food cannot cure every disease but poor nutrition can make it much harder for the body to stay healthy.

The Biggest Problem with Homemade Diets

Ironically, while many owners worry about commercial food, the most nutritionally inadequate diets I see are homemade; the randomly designed ones

The typical homemade meal looks something like this:

Chicken, rice

Maybe a carrot

Sometimes an egg

While these ingredients are wholesome, they do not provide all the nutrients a dog or cat requires.

Common deficiencies include:

- Calcium

- Iodine

- Zinc

- Copper

- Vitamin D

- Essential fatty acids

- Certain amino acids (especially for cats)

These deficiencies may not become obvious immediately.

Instead, they often develop gradually over months or years.

That is why "homemade" should never mean "unplanned."

When Homemade Diets Are Done Properly

A properly formulated homemade diet is a completely different story.

When designed to meet an individual pet's nutritional requirements, homemade diets can provide:

- High-quality protein

- Fresh ingredients

- Greater ingredient transparency

- Minimal unnecessary processing

- Flexibility for pets with allergies or medical conditions

- Excellent digestibility

The key difference is that the recipe must be balanced; not guessed.

Simply cooking meat and rice is not the same as formulating a complete diet.

Processing Isn't the Enemy But Balance Matters

Processing itself is not inherently harmful. In fact, it improves food safety and helps destroy many harmful microorganisms.

The real question is how much processing is appropriate while still preserving the nutritional quality of ingredients.

Modern veterinary nutrition increasingly recognizes that ingredient quality, digestibility, and overall dietary pattern all matter, not just whether minimum nutrient requirements are met.

As the field evolves, there is growing interest in diets that combine nutritional completeness with high-quality, minimally processed ingredients.

Can Commercial Diets Improve?

Absolutely.

The future of pet nutrition is not about choosing between homemade and commercial food.

It is about combining the strengths of both.

Imagine a commercial diet that is:

- Properly balanced

- Rich in whole-food ingredients

- Minimally processed where possible

- Highly digestible

- Backed by scientific research

- Convenient for owners

That represents an exciting direction for the industry and one that has the potential to support better long-term health.

Nutrition and Longevity

One of the most consistent findings in veterinary and human health research is that nutrition is a key contributor to healthy ageing.

Longevity is influenced by many factors:

- Genetics

- Body condition

- Exercise

- Preventive healthcare

- Environment

- Nutrition

No single food guarantees a long life.

However, providing balanced, high-quality nutrition throughout life supports the body's ability to maintain healthy organs, muscles, immunity, and metabolism.

Good nutrition is not simply about preventing disease but is about helping pets thrive.

My Take as a Veterinarian

If I had to summarize years of clinical experience into one sentence, it would be this:

Don't choose food based on marketing. Choose it based on biology.

- A poor homemade diet can create nutritional deficiencies.

- A highly processed commercial diet may not always represent the ideal nutritional approach for every individual pet.

The goal should never be to blindly defend one side or the other.

The goal should be to provide food that is:

- Nutritionally balanced

- Safe

- Highly digestible

- Made with quality ingredients

- Appropriate for the individual pet

As veterinarians, we often say that prevention is better than cure.

Nutrition is one of the few things we can improve every single day, one meal at a time.

Because every bowl of food is an investment, not just in today's health, but in the years your pet has ahead.

❤️

Dr. Romela Salgado