Common Misconceptions About What Pets Can Safely Eat

The appeal of raw diets is understandable — the logic being that wild ancestors ate uncooked meat, so domestic pets should too. But veterinary and public health organizations, including the American Veterinary Medical Association (AVMA), have raised consistent concerns about raw meat diets. Raw poultry, beef, and fish can carry Salmonella, Listeria, and other pathogens that survive in a pet's gut and shed into the household environment, where they can infect children, elderly family members, or immunocompromised individuals. Parasites like Toxoplasma and Trichinella are also a documented concern. If you're considering a non-standard diet for your pet, discuss the risks and benefits with a veterinarian who can evaluate your pet's individual health status.

Both garlic and onions belong to the Allium family and contain compounds called thiosulfates, which damage red blood cells in dogs and cats, potentially causing hemolytic anemia — a condition in which the body destroys its own red blood cells faster than it can replace them. Symptoms may not appear immediately, which is part of why small, repeated exposures are especially dangerous; the damage accumulates. Garlic is considered more potent per gram than onion. Neither ingredient, in any form — raw, cooked, powdered, or dehydrated — should be offered to pets or included in food you share with them.

The grain-free trend was largely driven by the assumption that grains are low-quality fillers added to cut costs. In reality, whole grains like brown rice and oats provide digestible carbohydrates, fiber, and micronutrients that support overall health. More critically, the U.S. Food and Drug Administration (FDA) investigated a potential link between grain-free diets — particularly those high in legumes like lentils and peas — and dilated cardiomyopathy (DCM), a serious and potentially fatal heart disease in dogs. While the research is ongoing and causation has not been definitively established, veterinary cardiologists have recommended caution. Unless your pet has a confirmed grain allergy diagnosed by a veterinarian, there is no established health reason to choose grain-free food.

The image of a cat lapping up a bowl of milk is deeply ingrained in popular culture, but it doesn't reflect feline biology. Most adult cats produce very little lactase — the enzyme needed to break down lactose, the sugar found in milk. Drinking cow's milk often results in diarrhea, gas, and stomach cramping. Kittens produce more lactase naturally, but they should receive their mother's milk or a veterinarian-approved kitten milk replacer — not cow's milk. If you want to offer your cat a liquid treat, there are specially formulated lactose-free cat milks available, but water remains the most important beverage for feline health.

Raw bones are sometimes discussed as a controversial but potentially lower-risk option under veterinary supervision, but cooked bones — regardless of the type — are widely considered hazardous by veterinary professionals. Heat changes the structure of bone, making it splinter rather than bend or crumble. Bone splinters can cause choking, lacerations to the mouth, throat, or digestive tract, intestinal blockages, and perforations that require emergency surgery. This applies to chicken, pork, and beef bones alike. If your dog enjoys chewing, ask your veterinarian about appropriate chew alternatives that don't carry these structural risks.

The exact substance in grapes and raisins that causes toxicity in dogs has not yet been definitively identified, which makes this one of the more frustrating hazards to explain — but the clinical evidence is clear. Veterinary poison control centers have documented cases of acute kidney failure in dogs after ingesting grapes or raisins, sometimes in surprisingly small quantities. There is no established safe dose, and individual dogs appear to vary in their sensitivity, meaning a dog who tolerated grapes once may be severely affected on another occasion. Raisins are considered even more concentrated in whatever the toxic compound is. Both should be treated as completely off-limits for dogs.