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It’s quite a common belief that dogs are much like their wolf ancestors and require meat to truly thrive. However, as science pulls back the curtain on canine biology, we’re finding that the answer to “Do dogs need meat?” is more nuanced than a simple yes or no. You aren’t just feeding an animal; you’re fueling a complex biological machine that cares more about chemistry than the ingredient source of its calories.
The Biological Truth About Your Dog’s Dinner
To understand what your dog needs, we have to look past the sharp canines and wagging tail. Their nutritional requirements are defined by the nutrients they absorb, not the specific ingredients you put in the bowl. In other words, dogs have nutrient requirements, not ingredient requirements.
The “Omnivore vs. Carnivore” Debate
While terms such as “facultative carnivores” or “opportunistic carnivores” are often used to describe dogs, scientific evidence over the past few decades has demonstrated that dogs are omnivores. This means that dogs have the ability to break down and utilize nutrients from both animal sources and plant-based ingredients. Indeed, the same has even been shown in wolves. Think of your dog’s digestive system like an engine. Unlike the engine of an obligate carnivore, which only runs on one specific high-octane fuel (animal protein), a dog’s engine is more of a hybrid. Dogs have the digestive machinery to process proteins and fats from both animal and plant sources.
The Evolution from Wolves to Modern Companions
The truth is that when it comes to diet and metabolism, dogs are not their wolf ancestors. Over tens of thousands of years, as dogs scavenged alongside humans, they adapted to eat what we ate—which included starches and grains. Domesticated dogs developed genetic adaptations that their wolf ancestors lacked and evolved to become biologically omnivorous. Dogs are actually adept at utilizing a wider range of food sources, which has served them well living alongside humans rather than in the wild.
One of the most significant genetic differences between dogs and wolves is the AMY2B gene. This gene is responsible for producing amylase, the enzyme that breaks down starch. Modern dogs have many more copies of this gene than wolves do, allowing them to efficiently turn carbohydrates into energy. This evolutionary “superpower” is why dogs can thrive on a diet that includes grains and legumes.
Protein: Understanding Essential Amino Acids
When we talk about meat, we are really talking about protein. Your dog’s body doesn’t actually recognize a piece of chicken or beef. It recognizes amino acids, which are the building blocks of protein.
Your Dog Needs Nutrients, Not Muscle Meat
Your dog’s body breaks down every protein they eat, whether plant or animal protein, into 22 amino acids. Ten of these are “essential,” meaning a dog’s body cannot produce them on its own. In other words, these ten essential amino acids must come from food. As long as your dog’s food provides all ten of these essential amino acids in the correct ratios, there is no physiological difference between whether that protein originated from a cow or a pea.
The key isn’t where these nutrients come from, but that they are present in the correct ratios and in bioavailable forms. As Dr. Swanson says, “Dogs have nutrient requirements, not ingredient requirements.”
How High-Quality Plant Proteins Compare to Animal Sources
Many people argue that plant proteins are “incomplete,” so animal protein is simply better. Here’s where the concern lies: while it is possible for dogs to eat a carefully formulated vegan diet, it is much easier to get the balance of essential amino acids wrong than to get it right with an exclusively plant-based diet. In other words, it depends on the specific vegan diet — but this is largely true of all diets.
The truth is that the vast majority of pet food use animal byproducts, which is one of the most inconsistent and unreliable protein sources. Byproducts such as organs (liver, kidneys) compared to connective tissues (bone, cartilage) have different digestibility rates and amino acid profiles, causing nutrient levels to fluctuate. Ingredients listed simply as “chicken byproducts” allow manufacturers to swap, for example, cartilage for organs — or worse, ingredients listed as “meat byproducts” allow manufacturers to change the source (e.g., swapping chicken for beef) — without updating the label, leading to inconsistent, unpredictable nutritional profiles.
In contrast, plant protein can provide much greater consistency in the final product. On the other hand, plant-based diets that are not carefully formulated can easily fall short of meeting a dog’s nutritional needs — just like a commercial pet food relying on inconsistent animal byproducts. It’s essential for pet parents to trust the pet food company and source of ingredients.
This is why Bramble tested the digestibility of its plant-based dog food — to ensure that dogs actually receive the intended nutrients in their bioavailable form. Indeed, Bramble’s plant protein was 82% digestible, which matches the digestibilty and bioavailability of premium animal protein.
What the Peer-Reviewed Science Tells Us
Peer-reviewed studies, including Bramble’s groundbreaking clinical trial, have shown that dogs on well-balanced plant-based diets often show no difference in health compared to those on meat-based diets. In some cases, owners reported fewer digestive issues and healthier weights. The key takeaway from the research is consistent: the balance of the diet is the predictor of health, not the presence of meat.
In Bramble’s feeding trial, conducted by Dr. Kelly Swanson, Director of the Division of Nutritional Sciences at the University of Illinois, Swanson tested Bramble’s vegan formulas against a leading brand chicken-based diet. The peer-reviewed results were published in the Journal of Animal Science. Prior to Bramble’s feeding trial, the digestibility of a vegan dog food had never been tested. That is why it is so meaningful that Bramble demonstrated that its food has such high nutrient and protein digestibility. Bramble was also proven to improve gut health and lower cholesterol.
In yet another study that lasted for one year, Western University of Health Sciences College of Veterinary Medicine found that adult dogs fed a nutritionally complete commercial plant-based diet maintained excellent health, with no adverse changes in blood work or cardiac biomarkers, and showed improvements in vitamin D and amino acid levels. The peer-reviewed results were published in PLOS ONE.
These studies debunk the most common myths about feeding dogs a plant-based diet. Fears that a meatless dog will inevitably become protein-deficient, or that dogs lack the ability to process nutrients from plants, are simply refuted by the peer-reviewed scientific evidence. What is most important is that the vegan diet is expertly formulated and tested like all other foods to make sure they’re safe and “complete and balanced.”
Ensuring Bioavailability and Nutrient Density
Whether your dog is suffering from animal protein allergies or you just wish to feed your dog a plant-based diet, it’s not as easy as swapping chicken for legumes. A plant-based diet for dogs must be carefully formulated to meet your dog’s precise dietary requirements.
Bioavailability refers to how easily your dog can actually use the nutrients in their food. As Dr. Swanson cautioned, “Anyone can slap together a vegan meal for their dog, but without careful formulation, you might have something that’s really imbalanced.” Companies, too, can easily sell commercial pet food without actually ensuring the bioavailability of what’s intended. Pet food formulators use specialized software to balance ingredients and nutrient levels using USDA data. The problem is that these computerized formulas do not account for the ingredient sources and cooking methods that are unique to each commercial pet food.
This is where many companies fall short — they borrow from other studies, such as Bramble’s feeding trial, to make claims about all vegan dog foods. In other words, so long as their own foods are formulated to be “complete and balanced” then they will also improve your dog’s health. This is simply not true. It’s crucial that companies invest in the actual testing to prove their own diet’s nutritional adequacy. High-quality, trusted vegan dog foods undertake this kind of third-party testing to ensure that your dog’s gut can absorb the maximum amount of nutrition with minimal waste.
So how can you be sure? Simply ask! Reach out to the pet food company and ask what third-party testing and clinical trial work they have performed. Request they send you the test results so that you can see for yourself and have your vet review whether this particular pet food would meet your dog’s nutritional needs.
Expert Answers to Common Concerns
Will my dog lose muscle mass without meat?
Absolutely not. Muscle mass is maintained by total protein intake and exercise. If the amino acid profile is complete, and you ensure that your dog is getting the essential nutrients they actually need, your dog will maintain their muscle strength and tone.
How do I know if my dog is thriving on a new diet?
Keep an eye on the “three Es”: Eyes (clear), Energy (consistent), and Excrement (firm and regular). If these three are in check, your dog is likely doing great. Regular veterinary check-ups and bloodwork are also important to monitor your dog’s overal health and well-being.
Give Your Dog the Science-Backed Bramble Meal They Deserve
In choosing a vegan pet food, it’s crucial to ensure that you’re meeting all your dog’s nutritional needs. It comes down to quality and trust. Here’s what separates Bramble from the rest:
- Formulated by Veterinary Nutritionists: Bramble’s plant-based recipes are formulated by a board-certified veterinary nutritionist. This is very different to being “approved by” or “reviewed by” a nutritionist. Many pet foods are formulated by food scientists and then claim to be “approved by” or even formulated by vets. When choosing a pet food, it’s important to read claims carefully and research brands. If you have any questions, always reach out and ask!
- Lab Tested: Bramble tests its food at an independent lab to ensure the intended nutrients are actually present and bioavailable. Beyond simply stating that formulations meet AAFCO (Association of American Feed Control Officials) standards, many companies do not lab-test their food to ensure that your dog is actually getting what is intended. With respect to vegan pet food, the risk of nutrient deficiencies is simply too high. To be sure, you can always email companies to ask for a full nutrient profile showing all the essential nutrients and a complete amino acid profile, which will show whether all essential amino acids are present in the correct ratios.
- Backed by Science: Bramble’s ground-breaking independent feeding trial tested the digestibility of Bramble’s nutrients. Bramble’s plant protein was as highly bioavailable as animal-based protein sources, while Bramble was also shown to improve gut health and significantly lower cholesterol.
- Highest Quality: Bramble doesn’t sacrifice drool-worthy taste and enjoyment for health. Bramble’s human-grade fresh food is made with a high quality blend of plant protein, including meat-like textured pea protein and a blend of protein-rich legumes. Our recipes are gently cooked to maintain the optimal nutritional value of the ingredients and, of course, the savory rich taste! Let’s face it, human-grade fresh food tastes the best!
You can shop for Bramble’s plant-based dog food here.