5 Health Problems That Could Be Caused By Your Dog's Food - iHeartDogs.com

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5 Health Problems That Could Be Caused By Your Dog’s Food

By: Adri Sandoval
Adri Sandoval is the Special Projects Manager for iHeartDogs and iHeartCats. Her work has deepened her love for animals, fostering a strong passion for rescue and animal advocacy.Read more
| April 1, 2026
iHeartDogs is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no extra cost to you.

When your dog gets sick, do you ever consider it could be the food in his bowl that is bringing him down? We often place blame for illness on issues like exposure to other sick pups, genetics, or sensitivities, but the truth is your dog’s diet is the cornerstone of his overall health. You place a lot of faith in the can or bag of food you pull off the shelf.

Serving Ollie food to Mabel

These are 5 health conditions – some extremely severe – that could be caused by your dog’s food, and one easy way to avoid them all.

1. Pica/Coprophagia

You might be familiar with the words “Pica,” or “Coprophagia,” but most pet parents know it by a different name: poop eating.

A dog who is starving for nutrients will put anything he can in his belly. Dogs often eat poop or grass, but some poor pups will even attempt to eat rocks or dirt to fill in the gaps in their diet. Not only can this behavior expose your pup to potentially dangerous diseases, but it can also lead to hefty surgery bills.

Though it’s sometimes caused by other issues, such as anxiety or boredom, making sure your dog is getting all the nutrients he needs will help keep non-food objects out of his stomach.

2. Food Allergies

Food allergies are extremely common in pups of all ages, breeds, and genders, and often caused by ingredients you might never suspect. Some common allergens include chicken, corn, dairy products, and wheat – ingredients you’ll probably notice when you read the nutritional contents on any package of dog food.

If your dog has food allergies, you may notice itchy skin, hives, swollen face, and tummy troubles. Many pet parents blame allergic reactions on the environment, but don’t forget that your food could be the culprit. See our list of the 12 Best Dog Foods For Allergies if you think your dog may be suffering from food allergies.

RELATED: The Complete Dog Food Guide: Nutrition, Ingredients, Feeding & How to Choose

3. Heart Disease

The FDA has been investigating a link between grain-free diets and Canine Dilated Cardiomyopathy (CDC), which enlarges the heart, making it more difficult for the circulation of blood throughout the body. Several foods, most of which have been labeled “grain-free” are thought to cause this disease in dogs. Though they have not concluded their investigation, the FDA is advising pet parents to consult their vets before feeding grain-free diets.

Unfortunately, many manufacturers still proudly make and label their food as grain-free, and numerous unaware dog lovers continue to feed their pups these foods because they believe dogs are carnivores. The truth is, dogs need a variety of foods to satisfy their dietary needs, including vegetables and grains.

4. Diabetes mellitus

Diabetes is sometimes an unfortunate side-effect of obesity. Excess sugar in the bloodstream can cause damage to vital organs and make the body “starve” for fuel – which will lead to it breaking down fats and proteins to make its own. Dogs who are overweight can develop an insulin resistance, resulting in a need for life-long care, as there is no cure for diabetes. When not treated, it can lead to kidney failure, liver disease, and even blindness.

Dogs with diabetes require frequent monitoring and daily insulin injections, as well as special diets that will keep their glucose levels low. The best preventative is to keep your dog on a healthy diet and lifestyle to help him avoid developing diabetes. You’d be surprised how much sugar the dog food in your pantry might have. It’s usually in the form of starchy fillers, which make up much more of the recipe than your dog needs – or can handle.

5. Obesity

Serving sizes on packaged food are often one-size-fits-all, and those numbers are not specific to the unique needs of your dog. Pet parents who feed according to package directions are often shocked to find they’ve been over or under-feeding their dogs. Additionally, obesity can cause painful joint problems, breathing issues, or can even shorten your pup’s lifespan.

It’s important your dog gets enough to eat without going overboard. Calorie counting is the usual solution, but it can be challenging to make sure your pup is getting the proper nutrition and calories while still getting enough food to keep his belly feeling full. Talk to your vet to make sure you’re meeting your dogs caloric needs.

How To Avoid Food-Related Health Issues

Feeding your dog a healthy, balanced diet is rarely as easy as picking a bag off a shelf. Many vets recommend fresh-made or raw diets over kibble, but these options can be expensive, time-consuming, and difficult to prepare and store safely.

The alternative is Ollie—a convenient, fresh-made meal option crafted to support your dog’s health without the hassle of DIY diets. With Ollie, you can avoid the pitfalls of many processed foods, such as those listed above. Ollie’s meals are carefully formulated with high-quality proteins, fresh vegetables, and essential nutrients, so your pup gets a complete, balanced diet in every bite. By choosing Ollie, you’re making a simple, healthy choice to give your dog the nutrition they need to thrive.

And don’t forget—get 60% off your first box of meals when you subscribe today! With Ollie, you can rest easy knowing your dog’s food is fresh, nutritious, and delivered on a schedule that fits your life. Plus, they offer free shipping across the contiguous United States!

Ready to see the difference fresh food can make? For a limited time, Ollie is offering 70% off your first box and a free bowl, followed by 20% off your next two deliveries. It’s the perfect way to treat your dog to healthier, happier mealtimes. Offer valid 3/26–4/12.

Try Ollie Now! 

Frequently Asked Questions

1. Can my dog’s food really affect their health?

    Yes, your dog’s diet plays a major role in their overall health. Poor-quality food can contribute to a variety of health issues, from digestive problems to more serious conditions.

2. What is pica or coprophagia in dogs?

    Pica or coprophagia refers to dogs eating non-food items like poop, grass, dirt, or even rocks. This behavior is often linked to nutritional deficiencies or unmet dietary needs.

3. Can a lack of nutrients cause unusual eating behaviors in dogs?

    Yes, dogs who are not getting enough nutrients may try to compensate by eating inappropriate items, which can lead to health risks and even require medical intervention.

4. What are common signs of food allergies in dogs?

    Signs of food allergies include itchy skin, hives, swelling, digestive issues, and general discomfort. These symptoms are often mistaken for environmental allergies.

5. What ingredients commonly trigger food allergies in dogs?

    Common allergens include chicken, corn, dairy, and wheat, which are frequently found in many commercial dog foods.

6. Can dog food contribute to heart disease?

    Some studies have explored a link between certain grain-free diets and heart conditions like dilated cardiomyopathy, making it important to consult your vet when choosing your dog’s diet.

7. How is diet related to diabetes in dogs?

    Diets high in sugars and starchy fillers can contribute to obesity, which increases the risk of diabetes. Managing your dog’s diet is key to preventing this condition.

8. Can poor diet lead to obesity in dogs?

    Yes, overfeeding and low-quality food with excess fillers can lead to weight gain, which may cause joint problems, breathing issues, and a shorter lifespan.

9. How can I prevent food-related health problems in my dog?

    Feeding a balanced, high-quality diet and ensuring proper portion control are the best ways to prevent many diet-related health issues.

10. Is fresh dog food better than kibble?

    Fresh dog food is often more nutritious and easier to digest than heavily processed kibble, making it a great option for supporting overall health.

11. How does Ollie help improve my dog’s health?

    Ollie provides fresh, balanced meals made with high-quality proteins and vegetables, helping ensure your dog gets the nutrients they need without fillers or artificial ingredients.

12. How do I know if I’m feeding my dog the right amount?

    Portion sizes vary based on your dog’s age, weight, and activity level. It’s best to consult your veterinarian or follow a personalized feeding plan to ensure proper nutrition.

Ollie chicken fresh food up close

Better Nutrition for a Healthier Dog

    Your dog’s health starts with what’s in their bowl. From preventing nutrient deficiencies and food allergies to reducing the risk of obesity and chronic conditions, choosing the right diet can make all the difference. By focusing on high-quality, balanced nutrition and avoiding heavily processed foods, you can help your dog live a longer, healthier, and happier life. Making the switch to fresh, thoughtfully prepared meals is a simple yet powerful step toward giving your pup the care they truly deserve.

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