Fall Dangers for Dogs: What Pet Owners Should Watch Out For

Fall is one of the most beautiful times of the year—cooler weather, colorful leaves, pumpkin spice everything. But while you and your pup may be ready to enjoy crisp walks and cozy evenings, the season also comes with a few hidden dangers for dogs. Knowing what to look out for can help you keep your furry companion safe while still soaking up all the autumn fun.

Toxic Plants & Mushrooms

Fall brings damp soil, cooler temps, and the perfect environment for mushrooms to flourish. While some are harmless, many varieties are toxic to dogs, and it’s nearly impossible to tell them apart without expert knowledge. Ingesting a toxic mushroom can cause vomiting, diarrhea, abdominal pain, seizures, or even organ failure. Because of the serious risks, the best rule is: if you see your dog eat a mushroom, contact your vet immediately.

Other fall plants can also pose dangers. Acorns, for example, are everywhere this time of year and contain tannins that can upset a dog’s stomach or, in larger amounts, damage their liver and kidneys. Chrysanthemums, popular fall flowers, can cause drooling, vomiting, and coordination problems if eaten. Even piles of wet, moldy leaves can make your pup sick if they decide to chew or roll in them.

Tip: During fall walks, keep your dog on leash and discourage them from foraging in yards, woods, or leaf piles. A little extra supervision goes a long way in keeping them safe.

Halloween Treats

Halloween is fun for humans, but it can be a nightmare for dogs. Many candies and treats contain ingredients that are toxic to pups:

• Chocolate: Contains theobromine, which dogs can’t metabolize. Dark chocolate and baking chocolate are especially dangerous.

• Xylitol: Found in sugar-free gum and candies, this artificial sweetener can cause a dangerous drop in blood sugar and even liver failure.

• Raisins: Sometimes tucked into “healthy” treat bags, raisins (and grapes) can cause kidney failure in dogs.

• Candy Wrappers: Even if the candy itself isn’t toxic, wrappers can cause choking or blockages if swallowed.

Beyond the food dangers, Halloween night can also be stressful for dogs—doorbells ringing, strangers in costumes, and lots of tempting treats at paw-level.

Tip: Keep candy bowls and trick-or-treat bags far out of reach. If you’re handing out candy, consider setting up a quiet room for your dog with a chew or toy so they can relax away from the excitement.

Antifreeze Exposure

As temperatures drop, many people winterize their cars and top off antifreeze. Unfortunately, antifreeze (ethylene glycol) has a sweet taste that attracts dogs, but just a few teaspoons can be fatal. It quickly damages the kidneys, often beyond repair, if not treated immediately.

Signs of antifreeze poisoning can appear within 30 minutes and may include staggering, drooling, vomiting, increased thirst, and lethargy. Without urgent veterinary care, symptoms can progress to seizures, coma, and death.

Tip: Always store antifreeze and other automotive fluids securely out of reach and clean up any spills right away. Even a small puddle in the driveway can be deadly for a curious pup.

Holiday Food Hazards

Fall is the start of holiday season, and while sharing is caring, sharing people-food with your dog can sometimes be dangerous. Many festive favorites can upset a dog’s stomach or even cause life-threatening reactions.

• Turkey skin & fatty foods: High-fat foods can cause pancreatitis, a painful and serious condition.

• Bones: Cooked bones splinter easily and can puncture or block the digestive tract.

• Onions, garlic, and chives: Common in stuffing and savory dishes, these can damage a dog’s red blood cells.

• Pumpkin pie & baked goods: Safe plain pumpkin is great for dogs, but pies often contain sugar, spices, or xylitol (toxic to dogs).

• Alcohol: Even small amounts of beer, wine, or cocktails can be extremely dangerous for dogs.

Tip: Create a “no table scraps” rule during gatherings and keep trash cans secured. If you want your dog to feel included, set aside plain, dog-safe foods like cooked turkey (no seasoning), green beans, or small bites of plain pumpkin.

Cold Weather & Darker Walks

While many dogs love the crisp air, cooler temps bring their own set of risks. Small breeds, short-coated dogs, seniors, and puppies are especially vulnerable to the cold. Hypothermia and frostbite can happen more quickly than many owners realize, especially if your pup gets wet from rain or an early snow. Consider a well-fitted dog coat or sweater for extra warmth and always provide a cozy spot to warm up when you come inside.

Shorter days also mean more walks in the dark. Low visibility increases the chances of accidents, especially near roads. Reflective collars, harnesses, leashes, or even LED lights (which come in a variety of collars, clip-ons, harnesses, and more) help keep your dog visible and safe. It’s a simple step that makes a huge difference.

Staying Ahead of Fall Dangers

all is a wonderful season to enjoy with your dog—crunchy leaves, cooler hikes, and holiday gatherings, but it’s also a time to stay mindful of hidden dangers. From toxic mushrooms to antifreeze puddles, Halloween candy to chilly nights, a little awareness goes a long way in keeping your pup safe and happy.

By planning ahead, setting boundaries during festivities, and taking a few safety precautions, you and your dog can fully embrace all the best parts of autumn together. After all, fall adventures are always better with your four-legged friend by your side.