Grain-Free Food and German Shepherds: What the FDA DCM Investigation Found

General nutrition information compiled from product labels and published sources, not veterinary advice. Your veterinarian is the right person to choose a diet for your dog, especially one with a health condition.

Many German Shepherd owners have heard that grain free dog food is linked to heart disease. Others have heard it is fine. Both sides tend to oversimplify what the U.S. Food and Drug Administration (FDA) actually reported.

This guide walks you through a calm, label-based way to think about the question. You will learn what the FDA investigation says, what it leaves open, and how to bring a useful list of questions to your veterinarian.

The short version

DCM stands for dilated cardiomyopathy, a disease of the heart muscle. The FDA's Center for Veterinary Medicine (CVM) has been looking at reports of non-hereditary DCM in dogs and the diets those dogs ate.

The FDA says no causal link has been established. It has not requested any recalls. It also says it has no definitive information that the diets in the reports are inherently unsafe. That is a long way from "grain-free food causes heart disease," and also a long way from "there is nothing to see."

What you need before you start

The bag or can of your dog's current food, or a photo of the full label.
The ingredient list and the nutritional adequacy statement (the small print that begins with wording such as "formulated to meet" or "animal feeding tests").
Your dog's age, current weight and any health history your veterinarian has recorded.
A pen or a notes app for questions to ask at the next visit.
About twenty minutes to read the two FDA pages linked in the sources below.

Step 1: Learn what the FDA investigation actually reported

Start with the primary source rather than a headline. The FDA CVM page on the investigation into a potential link between certain diets and canine dilated cardiomyopathy was last updated December 23, 2022. The FDA said it does not intend to release further public updates until there is meaningful new scientific information.

The FDA's companion Q&A page (content current as of August 19, 2024) is the latest FDA material on the subject. It says the agency received 1,382 reports of DCM in dogs from January 1, 2014 to November 1, 2022.

Keep that number in context. The FDA states that adverse event report counts alone do not establish a causal relationship with the reported products. A report is a record that someone told the agency about a case. It is not a finding that a food caused it.

Step 2: Notice that the reports are not only about grain-free food

This is the detail most often lost. According to the FDA Q&A, the reports involve both grain-free and grain-containing diets. So the phrase "grain free dog food DCM" describes a pattern the FDA looked at, not a clean dividing line between safe and unsafe foods.

The FDA does note that most of the diets in the reports list non-soy legumes or pulses, such as peas and lentils, high in the ingredient list. It also says pulses have been used in pet food for years with no evidence that they are inherently dangerous.

In plain terms, the open question is about the overall makeup of certain diets and how dogs respond to them. It is not a settled verdict on grains, or on any single ingredient.

Step 3: Check whether German Shepherds have a stated DCM predisposition

Owners reasonably want to know whether the breed itself is flagged. The sources we relied on for this breed do not state a DCM predisposition for the German Shepherd Dog.

The American Kennel Club (AKC) breed page lists the diet-relevant health topics it discusses for the breed as bloat (gastric dilatation-volvulus), hip and elbow dysplasia, and degenerative myelopathy. DCM is not among them there.

That is not the same as saying your dog cannot develop a heart problem. Heart health is a question for your veterinarian, who can look at your individual dog. If you want a breed-specific answer, ask your vet and your breeder or the German Shepherd Dog Club of America what they know about cardiac screening.

Step 4: Read your dog's label with this in mind

Now go to the bag. Work through it in this order:

Find the adequacy statement. It tells you whether the food is meant for growth, maintenance or all life stages, and whether it was tested by feeding trials or formulated to a nutrient profile.
Read the first five ingredients. Ingredients are listed by weight before cooking. Note whether peas, lentils or other pulses appear near the top, since that is the pattern the FDA described.
Check whether grains appear. A grain-free label will not list rice, oats, barley, corn or wheat. Many foods marketed for German Shepherds do list grains.
Write down what you see. Do not score the food yet. You are collecting facts for your vet.

As an example of what label data looks like, Royal Canin's German Shepherd Adult dry food lists chicken by-product meal, brown rice, oat groats, chicken fat and corn as its first five ingredients, and the company says it is not grain-free. Hill's Science Diet Adult Large Breed Chicken & Barley lists chicken, cracked pearled barley, brown rice, brewers rice and whole grain wheat first. These are label facts, not endorsements.

Step 5: Match the food to your dog's life stage and size

Whether a food is grain-free is only one label question, and for a growing puppy it may not be the most important one. The AKC lists adult German Shepherds at 65 to 90 pounds for males and 50 to 70 pounds for females, which puts many of them at or near the 70-pound line AAFCO uses for large-size dogs.

Under the model rule used in Kentucky's 12 KAR 3:039, a food whose adequacy claim names growth or all life stages must add one of two phrases. It either says "including growth of large size dogs (70 lb. or more as an adult)" or "except for growth of large size dogs (70 lb. or more as an adult)." For a German Shepherd puppy, that wording is worth finding on the bag.

Cornell University's College of Veterinary Medicine also advises feeding diets formulated for large breeds while puppies are growing, and avoiding overfeeding fast-growing large-breed puppies. It also advises against adding calcium or vitamin D to a growing puppy's diet. Those points matter at least as much as the grain question during the first year or so.

Step 6: Take your notes to your veterinarian

A veterinarian decides what is right for an individual dog. No article, including this one, can do that. Bring the label photo and your notes, then ask:

Is my dog's current food a good fit for their age, weight and health history?
Does anything about this ingredient list concern you in light of the FDA's reports?
Is heart screening worth discussing for my dog?
If we change foods, how should we do it and what should I watch for?
What symptoms should prompt a call before the next scheduled visit?

Do not change a prescription or veterinary-directed diet on your own. Prescription diets are something only a veterinarian prescribes.

Step 7: Compare options on the same label facts

If you and your vet decide to look at other foods, compare them using the same checklist so you are judging like with like. Our label-by-label comparison of dog foods for German Shepherds lists adequacy statements, first ingredients and calorie data in one place.

To be clear about the method, we compared label data. We did not run feeding trials or taste tests, so the comparison tells you what the label says, not how a food performs in your dog.

Tips for a clearer read

Go to the source. Read the FDA pages yourself. Headlines tend to compress "under investigation" into "proven" or "debunked."
Note the dates. The FDA's main update is from December 2022 and its Q&A content is current as of August 2024. Ask your vet whether anything newer has come out.
Keep the whole picture. For German Shepherds, the AKC and Cornell also point owners toward bloat risk, joint health and growth rate. Cornell suggests feeding two or more meals a day with smaller kibble to reduce bloat risk factors, which is a feeding-routine question rather than a grain question.
Watch your dog, not just the bag. Energy, appetite, breathing and exercise tolerance are things to report to your vet.

Common mistakes to avoid

Treating "grain-free" as a safety label. It describes what is left out, not what is in the bowl.
Assuming grains make a food safe. The FDA says its reports include grain-containing diets too.
Switching foods abruptly out of worry. Sudden changes can upset a dog's stomach. Ask your vet how to switch if a change makes sense.
Adding supplements to "balance" the food. Leave that decision to your veterinarian, especially for a growing puppy.
Reading a report count as a risk rate. The FDA's 1,382 reports do not tell you how likely any one dog is to be affected.

What to expect afterward

Doing these steps will most likely leave you with a clear picture of what is in your dog's food, which parts of the FDA findings apply to it, and a short list of questions answered by a professional who knows your dog.

It may also settle the question for you. If your dog eats a food that lists grains and no pulses near the top, you may find there is little to change. If your dog eats a grain-free food with pulses high on the list, you may decide with your vet to monitor, or to switch. Either outcome can be reasonable.

What the process cannot do is guarantee a result for your dog. The FDA has said the cause or causes of non-hereditary DCM are not established, so no label check can promise protection from heart disease.

Is grain free bad for German Shepherds?

The honest answer from the public record is that it is unresolved. The FDA has not established a causal link, has not requested recalls, and says it lacks definitive information that the diets are inherently unsafe. At the same time, it has not closed the question, and it has said it will share more only if meaningful new science emerges.

Because the sources do not name a DCM predisposition for the German Shepherd, there is no breed-specific rule to apply. That leaves the decision where it belongs, with you and your veterinarian, working from your dog's own label, age and health.