Should your pet eat grains?

As the paleo diet becomes more popular in the US, many pet parents have started to question the use of grain in their pet’s diet. There are many opinions about grains for cats and dogs. A veterinary nutritionist would tell you that corn is a great source of protein and is appropriate for both cats and dogs. A holistic veterinarian and many natural pet experts might hold the opinion that dogs should only be fed a grain free diet.

Let’s talk about why grains get so much buzz and what I recommend for dogs and cats.

First, let’s discuss what makes grains so controversial.

1. Genetic modification. This is a hot topic in both health and politics. Most of the nation’s corn and wheat have been genetically modified. When I think about genetically modified foods, there are two separate concerns that come to mind. First, we don’t have a lot of data to support the safety of consuming genetically modified organisms. We don’t really know the long term effects, if any, of consuming modified DNA. My second and biggest concern is the amount of pesticides that are sprayed on genetically modified foods. Wheat and corn are both genetically modified to withstand the direct application of glyphosate (Round Up). Consuming this pesticide on a daily basis has not been proven safe. Common sense would tell you that it is not safe to consume a chemical that disrupts the hormonal system and has been linked to cancer.

Much of the world’s wheat has been genetically modified over the past few decades. More and more of the human population is becoming sensitive to gluten. Many professionals in holistic health have implicated the genetic modification of wheat as the cause of these increasing sensitivities. While there is no data to support this theory, it is an interesting hypothesis.

2. Inflammation. Grains have long been implicated in causing inflammation. Including processed grains in dog and cat diets increases the amount of carbohydrates. Too much carbohydrate content in a diet can promote inflammation. Other components of grains such as gluten and lectins can also cause inflammation.

However, all grains are not created equal when it comes to inflammation. There are many grains such as rice and millet that do not contain gluten. Many of the ancient grains such as millet, amaranth and quinoa are thought to be less inflammatory and contain more protein. There is an emerging movement that supports sprouting grains. It is thought that sprouting grains lowers the amount of phytic acid. This acid decreases mineral absorption in the intestines. There are many anecdotal reports that people who cannot tolerate grains are able to process sprouted grains with no symptoms.

3. Ancestral Diet Theory. This is the argument that many use when supporting grain free diets for both animals and people. For example, there are many supporters of the raw meaty bones diet. The concept behind this diet is that domesticated dogs evolved from wolves. Therefore, we should be feeding them what wolves eat.

There are few problems with this logic. First, I think it is important to understand that wolves don’t really eat raw meaty bones. They take down small mammals and eat many parts of the animal including their organs and stomach contents. I know it is gross to think about, but stick with me here. Most of these mammals are eating grain based diets. So, the wolf is technically getting some grain and other organs to eat. When dogs are fed only meat on bones, the diet is missing nutrients that would otherwise be found in the stomach and organs. Also, wolves and coyotes do eat plants and berries.

The second reason this premise is flawed is it doesn’t take into account the thousands of years dogs have evolved with humans. Take my pug dog for example. He is so, so far from a wolf that throwing him a bone with meat for dinner wouldn’t make sense. He doesn’t have the dental occlusion to mechanically rip meat from a bone. Consider how many generations of dogs have occurred in the last several thousand years. It’s a lot. Now there are still some breeds that very much resemble wolves and would be able to eat small mammals with ease. I just want you to consider the diversity amongst our domesticated dogs.

Let’s make this applicable to cats. There is less diversity in the domesticated cat population and their genes have been traced back to a handful of kitties. Therefore, it is more appropriate to generalize what your house cat should be eating based off of its ‘wild’ counterpart. In fact, in the last 15 years, veterinarians are making strides to move cat’s diets back to a mouse model.

So what does this mean for your pet? Here is my current stance on grains for dogs and cats.

Dogs: Many dogs do great without grains. For dogs with allergies, I try a grain free diet as a first line therapy. In my hands, 10% of these dogs improve. However, I have encountered many dogs over the last decade that simply do better with grains in the diet. Some dogs have loose stool or can’t keep weight on without grains in the diet. In these cases, I recommend avoiding corn, wheat and barley. Like we discussed earlier, corn is mostly genetically modified. Wheat and barley both contain gluten and are very inflammatory.

While I support grain free diets for dogs, I don’t think they are the perfect diet for every dog. I see many dogs in my practice that thrive on diets with rice and sprouted grains. There is just no one size fits all recommendation here.

Cats: I feel more opinionated here. I strongly recommend feeding cats a very low or no grain diet. It is important to keep wheat, corn and barley out of their diet as well. Cats don’t metabolize carbohydrates in the same way. Consuming high carbohydrate diets can lead to inflammatory disease like diabetes.

Like with all controversial subjects, there are a lot of opinions. In the end, your pet will be the ultimate tie breaker. Listen to what their body is saying about the diet you are feeding.

What do you think about grain? Do your pets eat grain? I would love to hear from you! Leave a comment below.

With love,
dr. angie signature boulder holistic vet

FREE Guide: Raw Feeding Cats & Dogs​

Feeding your furry friend a raw diet can be a game-changer for their health and happiness!

Grab my FREE guide today!

Get the FREE Guide to
Raw Feeding for Cats & Dogs!

9 thoughts on “Should your pet eat grains?”

  1. Hi Dr. Angie,
    We have a 13 week old miniature poodle and we want to add grains to his grain-free food. How much grain would you recommend adding per serving?
    Many thanks!

  2. I’m glad to find this information. I have been feeding a grain free diet to our poodle/ bishon mix since we’ve had her. She was three then and is now six. I just came across the idea that grains are needed in dog’s diets, but looking deeper I discovered that some breeds, including poodles, have difficulty with potatoes, including sweet, because they block taurine. So many if not most commercial dog foods substitute potatoes and legumes for the grains. What dog food do you recommend that is grain, potato and legume free? She is a very meat oriented dog. She’s not much interested in fruits or vegetables. She seems to be a strict carnivore. She was rescued from a wild backyard where she lived on her own for a good while—3 months or so. I think she probably lived on squirrels and possibly pecans.

    • I get pure balance grain free wet food from Walmart. It’s potatoes pea and legume free. I add veggies to it. I’m debating whether or not to add grains and see how my dog reacts.

  3. This is so interesting! I switched my bulldog to grain-free at the advice of a vet because of his focal tremors(started at a young age). I really believed this helped a lot as they almost disappeared for many years. He is now 8 and after a move from west coast to east coast there are too many changes for me to figure out why they have come back very frequently, but the more recent vet scared me into going back to a grain based diet because of literature saying the grain free diets can lead to heart problems. This is all too confusing to me but if I should split the difference and keep him on his grain-free diet and add a little grain to it. what would you recommend adding as the safest grain choices.

    • Hi Miriam!

      This is super confusing, I agree. It isn’t the absence of grains causing the problem. For some reason, some dogs are not absorbing enough taurine in these diets. Adding grains to a grain free diet may not mitigate the problem. But to answer your question about grains: I like rice and ancient grains like millet and quinoa. Let us know if you need anything else!

      Dr. Angie

  4. Hi Angie. Heard you moved; hope you love your new place! Such a hot summer. I have been meaning to let you know how Jack is doing with his allergies. I decided to put them both on a grain free diet this spring after realizing the Merrick LTD ingredient is grain free. I still cook for them both so that’s the bulk of their diet. Here’s the amazing thing … Jack hasn’t had problems for the first time ever with his allergies and I believe it is related to being grain free. The only thing he’s had this year is a small hot spot on his foot but I think that could have started as an insect bite or abrasion or something. I am using dermalone on that. It is fantastic that he isn’t scratching all the time. Don’t know why I never thought of it before but I will keep them both on a grain free diet for sure! Hope you are all doing well!!! Sending hugs!


Leave a Comment