Halloween is full of fun for us humans—but for our pets, it can bring a few hidden dangers. As a veterinarian, I see more preventable toxic exposures around this time of year than almost any other holiday. Here are the top toxicities to watch out for during spooky season:

1. Chocolate

Chocolate contains theobromine and caffeine, both toxic to dogs and cats. The darker the chocolate, the more dangerous it is. Even small amounts can cause vomiting, restlessness, rapid heart rate, or seizures. Keep candy bowls far out of paw’s reach, and teach kids not to share their treats.

2. Sugar-Free Candy and Gum

Many sugar-free products contain xylitol, a sweetener that can cause a sudden drop in blood sugar and severe liver damage in dogs. Symptoms can appear within minutes—vomiting, weakness, or collapse are red flags that need immediate veterinary attention.

3. Glow Sticks and Costume Accessories

Glow sticks, costume jewelry, and fake blood can contain irritating chemicals or dyes. While not usually deadly, they can cause drooling, vomiting, or mouth irritation if chewed or punctured.

4. Decorations and Candles

Curious cats and wagging tails can easily knock over lit candles or jack-o’-lanterns, leading to burns or fires. Tinsel, fake cobwebs, and string lights are also choking or intestinal blockage hazards—especially for cats.

5. Raisins and Grapes

Even tiny amounts of raisins or grapes can cause acute kidney failure in dogs. Because toxicity levels vary from pet to pet, it’s best to treat all exposures as serious emergencies.

Keep the Night Safe

Make Halloween safer by:

  • Keeping pets in a quiet, secure room during trick-or-treat hours
  • Checking costumes for choking hazards and comfort
  • Having your veterinary clinic’s emergency number handy

If you suspect your pet has eaten something toxic, call us or the ASPCA Poison Control Center (888-426-4435) immediately