20 Worst Dog Foods for Medium Sized Breeds: Avoid These Harmful Options

Choosing the right dog food is crucial for maintaining your medium-sized breed’s health and well-being.

Many commercial dog foods on the market contain low-quality ingredients, fillers, and artificial additives that can negatively impact your pet’s nutrition and overall health.

Medium-sized dog breeds have specific nutritional needs that differ from small and large breeds.

Some popular dog food brands fail to meet these requirements, potentially leading to health issues such as obesity, digestive problems, and nutrient deficiencies.

This article examines 20 of the worst dog food options for medium-sized breeds, helping owners make informed decisions about their pets’ diets.

1. Kibbles ‘n Bits Bistro Meals

Kibbles ‘n Bits Bistro Meals is a dog food brand that raises concerns for medium-sized breeds. The product contains low-quality ingredients that may not provide adequate nutrition for these dogs.

Corn and soybean meal are listed as primary ingredients, which offer limited nutritional value compared to high-quality protein sources. These fillers can be harder for dogs to digest and may contribute to weight gain.

The food also contains artificial colors and flavors, which are unnecessary additives that don’t benefit a dog’s health. Some dogs may experience allergic reactions or digestive issues from these synthetic ingredients.

Kibbles ‘n Bits Bistro Meals lacks sufficient high-quality protein sources that medium-sized breeds need for muscle maintenance and overall health. This can potentially lead to nutritional deficiencies over time.

The product’s fat content comes largely from animal fat preserved with BHA, a controversial preservative that some studies have linked to potential health issues in animals.

2. Ol’ Roy Complete Nutrition

Ol’ Roy Complete Nutrition is a budget-friendly dog food brand sold exclusively at Walmart. Despite its low price point, this food raises concerns for medium-sized dog owners.

The first ingredient listed is ground yellow corn, which provides little nutritional value for dogs. Corn is a common filler used to bulk up pet food cheaply.

Meat by-products and animal fat make up the main protein sources. These ingredients can be inconsistent in quality and may include less desirable animal parts.

The food contains artificial colors and preservatives, which some dogs may be sensitive to. These additives offer no nutritional benefits and are used primarily for appearance.

Ol’ Roy Complete Nutrition lacks high-quality protein sources and essential nutrients that medium-sized breeds need for optimal health. Its low price reflects the use of inexpensive, low-quality ingredients.

3. Grreat Choice Adult Formula

Grreat Choice Adult Formula is a budget-friendly dog food option that may not provide optimal nutrition for medium-sized breeds. This product contains corn and meat by-products as primary ingredients, which are less digestible and nutritious than whole meats.

The formula lacks sufficient high-quality protein sources essential for maintaining muscle mass in active medium-sized dogs. It also contains artificial colors and preservatives that some pet owners prefer to avoid.

The ingredient list reveals a high concentration of fillers and low-quality grains, which can lead to weight gain and digestive issues in some dogs. These ingredients provide empty calories without contributing significant nutritional value.

Grreat Choice Adult Formula does not include beneficial supplements like glucosamine or chondroitin for joint health, which is important for medium-sized breeds prone to joint problems.

4. Purina Dog Chow Complete Adult

Purina Dog Chow Complete Adult is a budget-friendly dog food that may not provide optimal nutrition for medium-sized breeds. The first ingredient is whole grain corn, which offers limited nutritional value for dogs.

This formula contains by-product meal, a less desirable protein source compared to whole meats. It also includes artificial colors and preservatives, which some pet owners prefer to avoid.

The protein content in this food is relatively low, potentially insufficient for active medium-sized dogs. Additionally, it contains soybean meal, a common allergen for some dogs.

While Purina Dog Chow Complete Adult meets basic nutritional standards, it may not provide the high-quality ingredients and balanced nutrition that many medium-sized breeds require for optimal health and well-being.

5. Beneful Originals with Real Beef

Beneful Originals with Real Beef is a popular dog food option that raises concerns for medium-sized breeds. The product prominently features beef as the main ingredient, which may appeal to pet owners.

Upon closer inspection of the ingredient list, corn and chicken by-product meal appear before beef. This suggests that the actual beef content is lower than advertised.

The formula contains artificial colors and preservatives, which some experts advise avoiding in dog diets. These additives offer no nutritional value and may cause adverse reactions in sensitive dogs.

Beneful Originals with Real Beef also includes propylene glycol, a controversial ingredient used to maintain moisture in pet foods. Some veterinarians question its long-term safety for canine consumption.

The protein content in this food is relatively low compared to premium dog food brands. This may not meet the nutritional needs of active medium-sized breeds.

6. Pedigree Adult Complete Nutrition

Pedigree Adult Complete Nutrition is a widely available dog food that may not be optimal for medium-sized breeds. The product contains corn and meat by-products as primary ingredients, which are less nutritious than whole meats.

This food also includes artificial colors and flavors, which provide no nutritional benefit to dogs. Some medium-sized breeds may be sensitive to these artificial additives.

The protein content in Pedigree Adult Complete Nutrition is lower than what many veterinarians recommend for active medium-sized dogs. This could potentially lead to inadequate muscle maintenance and energy levels.

Additionally, the food contains high levels of grains, which some dogs may have difficulty digesting. This could result in gastrointestinal issues for certain medium-sized breeds.

7. Iams ProActive Health Smart Puppy

Iams ProActive Health Smart Puppy contains corn as its first ingredient, which is not an ideal protein source for dogs. This food relies heavily on plant-based proteins rather than high-quality animal proteins.

The formula includes by-product meal, which consists of less nutritious parts of animals. It also contains artificial preservatives and colors that may cause allergic reactions in some dogs.

While marketed for puppies, this food lacks the balanced nutrition growing medium-sized breeds need. It falls short in providing essential fatty acids crucial for brain and eye development.

The high grain content could lead to weight gain and digestive issues in some puppies. Medium-sized breeds may experience difficulty maintaining a healthy weight on this food.

8. Alpo Come & Get It Cookout Classics

Alpo Come & Get It Cookout Classics is a dog food product that raises concerns for medium-sized breeds. The formula relies heavily on low-quality meat by-products and artificial additives.

The first ingredient listed is ground yellow corn, which provides little nutritional value for dogs. This grain filler can be difficult for some canines to digest properly.

The food contains artificial colors like Red 40 and Yellow 5, which offer no benefits and may cause allergic reactions in sensitive dogs. Artificial preservatives such as BHA are also present, potentially leading to health issues with long-term consumption.

Protein sources in this food come mainly from meat and bone meal rather than whole meats. This processed ingredient lacks the complete amino acid profile found in higher-quality protein options.

The fat content derives primarily from beef tallow, a less optimal choice compared to healthier fats like fish oil or flaxseed oil. This formula falls short in providing balanced nutrition for medium-sized breeds.

9. Cesar Filets in Gravy

Cesar Filets in Gravy is a popular choice for medium-sized dog owners due to its convenient packaging and appealing appearance. However, this wet dog food falls short in several key nutritional areas.

The product contains meat by-products as a primary ingredient, which are generally considered lower quality protein sources compared to whole meats. It also includes artificial colors and flavors, which offer no nutritional benefit to dogs.

The high moisture content in Cesar Filets in Gravy means that the actual nutrient density is lower than it appears. This can lead to dogs needing to eat more to meet their nutritional needs, potentially contributing to weight gain.

While the gravy may make the food more palatable, it often contains added salt and sugar. These ingredients can be harmful to dogs, especially those with certain health conditions.

10. Ol’ Roy High Performance Dog Food

Ol’ Roy High Performance Dog Food is marketed as a budget-friendly option for active dogs. Despite its affordable price, this food raises concerns for medium-sized breeds.

The primary ingredient is ground yellow corn, which provides little nutritional value for dogs. Meat by-products and animal fat follow, offering questionable protein sources.

This food contains artificial colors and preservatives that may cause allergic reactions or long-term health issues in some dogs. The high grain content could lead to digestive problems in sensitive canines.

Ol’ Roy High Performance lacks essential nutrients and high-quality protein sources that medium-sized breeds need for optimal health. Its low-cost ingredients may not provide adequate nutrition for active dogs.

Pet owners should consider higher-quality alternatives that better meet their medium-sized dogs’ nutritional needs. Consulting with a veterinarian can help in choosing a more suitable diet for their pets.

11. Gravy Train Beefy Classic

Gravy Train Beefy Classic is a budget-friendly dog food option that falls short in providing adequate nutrition for medium-sized breeds. The product’s main ingredient is corn, which offers limited nutritional value for dogs.

This food contains meat and bone meal as its primary protein source. While it provides some protein, the quality is inferior to whole meat ingredients. The formula also includes artificial colors and flavors, which are unnecessary additives for dogs.

Gravy Train Beefy Classic lacks essential nutrients that medium-sized breeds require for optimal health. It contains minimal amounts of fruits, vegetables, and high-quality protein sources. The food’s low-quality ingredients and nutritional deficiencies make it a poor choice for medium-sized dogs.

12. Wag Dry Dog Food

Wag Dry Dog Food, an Amazon-branded product, raises concerns for medium-sized breeds. The food’s primary ingredients often include corn and by-product meals, which provide limited nutritional value for dogs.

These ingredients can be difficult for some dogs to digest, potentially leading to gastrointestinal issues. The food also contains artificial preservatives and colors, which may cause allergic reactions in sensitive dogs.

Wag Dry Dog Food typically lacks sufficient high-quality protein sources essential for maintaining muscle mass in medium-sized breeds. The formula’s low moisture content can contribute to dehydration, especially in less active dogs.

While marketed as an affordable option, the food’s nutritional profile falls short of meeting the specific needs of medium-sized breeds. Pet owners should consider higher-quality alternatives that provide better nutrition for their dogs’ long-term health and well-being.

13. Sportmix Wholesomes Variety

Sportmix Wholesomes Variety raises concerns for medium-sized dog breeds. This food contains corn and wheat as primary ingredients, which can be difficult for some dogs to digest.

The protein content in this product is lower than ideal for active medium-sized dogs. It may not provide sufficient nutrients to maintain muscle mass and energy levels.

Artificial colors and preservatives are present in Sportmix Wholesomes Variety. These additives offer no nutritional benefit and may cause allergic reactions in sensitive dogs.

The fat content in this food is relatively high, which could lead to weight gain in less active medium-sized breeds. This can put unnecessary strain on their joints and overall health.

While Sportmix Wholesomes Variety is marketed as a complete diet, it falls short in providing optimal nutrition for medium-sized dogs. Pet owners may want to consider alternatives with higher-quality ingredients and better nutritional balance.

14. Evolve Chicken & Rice Formula

Evolve Chicken & Rice Formula raises concerns for medium-sized dog owners. This food contains chicken by-product meal as its primary protein source, which is less digestible than whole chicken.

The formula includes corn and soybean meal, both common allergens for dogs. These ingredients may trigger sensitivities in some medium-sized breeds.

Artificial colors and flavors are present in this food, potentially causing adverse reactions in sensitive dogs. These additives offer no nutritional benefit and are best avoided.

The protein content is lower than ideal for active medium-sized breeds. This may not adequately support muscle maintenance and growth in these dogs.

Evolve Chicken & Rice Formula lacks probiotics and sufficient fiber sources. This omission could negatively impact digestive health in medium-sized dogs.

15. SmartBlend Lamb & Rice Formula

SmartBlend Lamb & Rice Formula contains lamb and rice as primary ingredients. This dog food includes by-product meal, which can be of lower quality than whole meat sources.

The formula contains artificial colors and flavors. These additives may cause allergic reactions or digestive issues in some dogs.

SmartBlend Lamb & Rice Formula has a high carbohydrate content. This can lead to weight gain in less active medium-sized breeds.

The food includes corn gluten meal as a protein source. This ingredient is less biologically valuable for dogs compared to animal-based proteins.

While the food provides some essential nutrients, it may not offer optimal nutrition for medium-sized breeds. Dog owners should consider alternatives with higher-quality ingredients and fewer artificial additives.

16. Triumph Puppy and Active Dogs

Triumph Puppy and Active Dogs is a dog food brand that raises concerns for medium-sized breeds. The product contains corn and meat by-products as primary ingredients, which may not provide optimal nutrition for growing puppies or active dogs.

The formula includes artificial colors and flavors, potentially causing allergic reactions or digestive issues in sensitive dogs. These additives offer no nutritional value and may be harmful in the long term.

Triumph Puppy and Active Dogs lacks sufficient high-quality protein sources essential for muscle development and maintenance in medium-sized breeds. The limited animal-based proteins may not meet the nutritional needs of active or growing dogs.

The food’s high grain content and use of fillers can lead to weight gain and digestive problems in medium-sized breeds. This formulation may not provide the balanced nutrition required for optimal health and energy levels in these dogs.

17. Whole Earth Grain-Free Dog Food

Whole Earth Grain-Free Dog Food raises concerns for medium-sized breeds. This product contains peas and lentils as primary ingredients, which may contribute to canine dilated cardiomyopathy (DCM) in some dogs.

The formula lacks sufficient animal protein sources, relying heavily on plant-based proteins instead. This imbalance can potentially lead to nutritional deficiencies in medium-sized dogs.

Despite being grain-free, this food includes ingredients like potatoes and sweet potatoes. These starchy components may cause rapid blood sugar spikes in some dogs, potentially leading to weight gain or other health issues.

The use of artificial preservatives in this food is another point of concern. These additives might have negative long-term effects on a dog’s health, particularly for medium-sized breeds with specific nutritional needs.

18. Authority Chicken & Rice Formula

Authority Chicken & Rice Formula falls short of meeting the nutritional needs of medium-sized breeds. This dog food contains chicken by-product meal as its primary protein source, which is less digestible than whole meat.

The formula relies heavily on corn and rice, potentially leading to weight gain in less active dogs. These ingredients provide minimal nutritional value compared to higher-quality protein sources.

The food lacks sufficient omega-3 fatty acids, crucial for maintaining healthy skin and coat. It also contains artificial preservatives, which some pet owners prefer to avoid.

While the price point may be attractive, the nutritional profile does not justify compromising on quality. Medium-sized breeds require balanced nutrition to support their energy levels and overall health.

Pet owners seeking optimal nutrition for their medium-sized dogs should consider alternatives with higher-quality ingredients and better nutritional balance.

19. Twin Pet Dry Dog Food

Twin Pet Dry Dog Food ranks among the least desirable options for medium-sized breeds. This budget-friendly product fails to meet essential nutritional standards for canine health.

The primary ingredient is ground yellow corn, which provides minimal nutritional value for dogs. Meat and bone meal follow, raising concerns about the quality and digestibility of the protein sources.

The formula lacks specific named meat proteins, relying instead on generic animal fats and by-products. This makes it difficult to ascertain the true nutritional content and quality of ingredients.

Twin Pet Dry Dog Food contains artificial colors and preservatives, which may cause adverse reactions in some dogs. The absence of fruits, vegetables, or beneficial supplements further diminishes its nutritional profile.

For medium-sized breeds with specific dietary needs, this food falls short in providing balanced nutrition. Pet owners seeking optimal health for their dogs should consider higher-quality alternatives.

20. Field Trial Complete Nutrition

Field Trial Complete Nutrition dog food raises concerns for medium-sized breeds. This budget-friendly option often contains low-quality ingredients that may not meet the nutritional needs of these dogs.

The primary protein source in Field Trial Complete Nutrition is typically a meat by-product meal. This ingredient is less digestible than whole meat proteins, potentially leading to reduced nutrient absorption.

Corn and wheat frequently appear as main ingredients in this food. These grains can be difficult for some dogs to digest and may contribute to weight gain or allergies in sensitive individuals.

Field Trial Complete Nutrition often lacks essential fatty acids and high-quality sources of vitamins and minerals. This deficiency can impact a medium-sized dog’s coat health, energy levels, and overall well-being.

The food’s relatively low protein content may not adequately support muscle maintenance and growth in active medium-sized breeds.

Nutritional Needs of Medium Sized Breeds

Medium-sized dogs require a balanced diet tailored to their specific energy requirements and health needs. Proper nutrition supports their growth, maintains their ideal weight, and promotes overall wellbeing.

Essential Nutrients

Proteins are crucial for medium-sized breeds, supporting muscle development and repair. High-quality animal proteins should make up 18-25% of their diet. Fats provide energy and help absorb vitamins, with 10-15% being ideal for most medium dogs.

Carbohydrates supply quick energy and fiber, comprising 30-70% of the diet. Essential vitamins and minerals support various bodily functions. Calcium and phosphorus are vital for bone health, while omega-3 fatty acids promote skin and coat health.

Water is often overlooked but remains critical. Fresh, clean water should always be available to prevent dehydration and support organ function.

Common Deficiencies

Medium-sized breeds can face specific nutritional deficiencies if their diet is not properly balanced. Protein deficiency may lead to muscle weakness and poor coat quality. Insufficient calcium can result in weakened bones and dental issues.

Lack of omega-3 fatty acids might cause skin problems and inflammation. Vitamin B12 deficiency can lead to digestive issues and neurological problems. Iron deficiency may cause anemia and fatigue.

Overfeeding is also a concern, potentially leading to obesity and joint problems. Regular vet check-ups can help identify and address any nutritional imbalances in medium-sized dogs.

Identifying Poor Quality Ingredients

Reading dog food labels carefully can help pet owners spot potentially harmful ingredients. Certain additives and fillers offer little nutritional value and may negatively impact a dog’s health.

Fillers and By-Products

Corn and wheat gluten are common fillers in low-quality dog foods. These ingredients bulk up the food but provide minimal nutritional benefits. Meat by-products often include less desirable animal parts like beaks, feet, and organs. While some organ meats can be nutritious, generic “by-product” listings may indicate poor quality.

Soy is another filler to watch for, as it can be difficult for dogs to digest. Bone meal and animal digest are less expensive protein sources that may replace higher-quality meat ingredients. These fillers can lead to nutritional deficiencies and digestive issues in medium-sized breeds.

Artificial Additives

Artificial colors like Red 40, Yellow 5, and Blue 2 serve no nutritional purpose in dog food. These dyes may cause allergic reactions or hyperactivity in some dogs. Artificial preservatives such as BHA, BHT, and ethoxyquin have been linked to health concerns in animals.

Propylene glycol, used to keep semi-moist dog foods soft, can be harmful in large quantities. Artificial sweeteners like xylitol are toxic to dogs and should never be present in their food. Watch for vague terms like “natural flavors,” which may mask less desirable ingredients.