Food is food, right? Wrong. Human food does not necessarily equal healthy pet food, and not even pet food works for every type of pet. Just as dogs cannot eat foods like grapes, chocolate, and avocado, cat food is also considered not safe for dogs. Of course, it’s more complex than just a simple “no.” If your dog eats cat food one or two times, it is not that big of a deal; however, it becomes a cause for concern and significantly affects a dog’s health when they eat cat food over an extended period. Eating cat food can cause myriad health issues for a dog, including pancreatitis, obesity, and gastrointestinal upset, among others. Dr. Julie Buzby, DVM, who practices in Beaufort, SC, says, “It is not necessarily dangerous for a dog to eat cat food (unless the dog has specific dietary restrictions related to a health problem); however, it’s not ideal. Cat food is formulated for cats, and dog food is formulated for dogs. They are very different animals with different nutritional needs.” Dogs are omnivores, which means their stomach can tolerate both meat and plant-based food. Cats, on the other hand, are obligate carnivores, so their sensitive stomach can really only handle meat, and they literally require it to survive. This key difference in nutritional needs is why dogs, even an adult dog, really should not eat cat food. Dogs’ nutritional requirements require a more varied diet, and they need only 10 amino acids, whereas cats need an 11th: taurine. Taurine is crucial for cats’ health in many areas, including vision, heart function, digestion and an overall immunity. Cat food fulfills a cat’s unique nutritional needs, as it contains more meat-based protein, fat content and carbohydrates in addition to taurine. You may have heard that veterinarians sometimes will prescribe cat food to dogs, particularly in puppies who may need more protein in their diet. However, while that may be true, Dr. Buzby says it’s an outdated method. “Perhaps decades ago [feeding cat food to puppies] was common, but in 2023, veterinarians have at our fingertips a plethora of excellent dog foods to prescribe or recommend—even if it means ordering online,” Dr. Buzby explains. “Furthermore, we can connect our clients to a board-certified veterinary nutritionist who can custom-formulate a diet (based on a dog’s age/stage, palate preferences and bloodwork), which can be cooked at home.” If your dog (or your cat) is on a veterinary diet, you should take that into consideration as well while assessing the levity of the situation. “Veterinary diets are formulated for a specific species—cat or dog, not both—and special health conditions,” Dr. Buzby says, citing low-fat, easily digestible foods for dogs prone to pancreatitis as an example. “Obviously, it is much more concerning for a dog who is on a prescription diet to eat cat food than a healthy dog who has no dietary restrictions,” she says. It goes both ways, too, according to Dr. Buzby, who says that a cat eating dog food regularly is actually more harmful.,Jump to section Is Cat Food Bad for Dogs? 4 Ways Cat Food Is Bad for Dogs How To Keep Your Dog Away From Your Cat’s Food What To Do if Your Dog Eats Cat Food