Family Sues Popular Dog Food Brand After Goldendoodle's Death Linked to Grain-Free Diet
A new class-action lawsuit is raising tough questions for dog parents after a family claims their pet's 2024 death was tied to a dog food linked to DCM, or dilated cardiomyopathy, a serious heart condition in dogs.
The case is adding fuel to an already growing debate about grain-free diets and whether they're as safe as many pet parents believe. Now, with more attention on the possible risks, some dog families are starting to wonder if the food in their dog's bowl could be doing more harm than good.
What We Know About the Blue Buffalo Lawsuit
Ryan and Diana Walsh of Lake County, Illinois, filed a class-action lawsuit against Blue Buffalo, as they believe the dog food killed their Goldendoodle, Maya.
They had raised the 10-year-old Poodle mix since puppyhood, and they had no reason to believe she was ill until she suddenly began having trouble walking in 2023. Maya was diagnosed with dilated cardiomyopathy, which has potential links to a grain-free diet, and her veterinarian recommended that the Walshes change her diet immediately.
Related: Urgent Recall Issued for Popular Puppy Food Over Serious Health Risks
The Blue Buffalo lawsuit alleges that Maya was fed the brand's "Wilderness Chicken Grain-Free" recipe from 2017 to 2022, after the Walshes sought the highest-quality food for their beloved dog. The recipe's listing claims to contain a "precise blend of antioxidants, vitamins, and minerals carefully selected by veterinarians and animal nutritionists that help support: healthy oxidative balance, immune system health, and life stage requirements."
Instead, the Walshes claim they fed the family's Goldendoodle a product that would put her life at an irreversible risk. Although Maya stopped eating Blue Buffalo food following her diagnosis, she passed away from congestive heart failure caused by the DCM in 2024.
In the lawsuit, the Walshes claim Blue Buffalo either has known or should have known about the alleged link between grain-free diets and DCM. The lawsuit accuses the brand of violating Illinois' Consumer Fraud and Deceptive Business Practices Act, unjust enrichment, fraudulent concealment, misrepresentation, and failure to warn.
What Dog Parents Should Do Now
Blue Buffalo isn't the only dog food linked to DCM, though the nature of the link is still uncertain. In July 2018, the FDA began investigating reports of dogs developing non-hereditary dilated cardiomyopathy after eating pet foods labeled 'grain-free.' While this research has not uncovered an undeniable cause-and-effect relationship, scientists believe taurine absorption may play a role.
SIGN UP to get "pawsitivity" delivered right to your inbox with inspiring & entertaining stories about our furry & feathered friends
The dog food lawsuit claims that UC Davis cardiologists found a correlation between grain-free diets and reduced taurine absorption in canines. While not considered an essential amino acid for dogs, taurine plays an important role in canine cardiovascular health.
But should pet parents swap out their dog's food? The best way to decide is to talk to a veterinarian, who can help weigh the pros and cons of different diets. Some dogs genuinely need a grain-free diet due to canine allergies or food sensitivities, but it may not be the best choice for every pet.
Copyright 2026 The Arena Group, Inc. All Rights Reserved
This story was originally published April 23, 2026 at 6:45 PM.