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Chocolate Toxicity in Dogs: Which Kinds Are Worst and What to Do

Dark and baking chocolate are the most dangerous. Here’s what the ASPCA and the AVMA say, and the numbers to call if your dog eats some.

By SHOP & SPOT EditorsLast reviewed Nov 9, 2026Research-based guide · 3 sources

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A brown and white dog standing next to a bowl of food.

Photo: Ayla Verschueren on Unsplash

This guide is for dog owners whose dog just got into chocolate, or who want to dog-proof the house before holidays full of sweets.

Chocolate is one of the most common holiday hazards for dogs. If your dog just ate some, call your veterinarian or a pet poison hotline now. Don’t wait for symptoms.

Who to call

  • Your veterinarian or the nearest emergency animal clinic.
  • ASPCA Animal Poison Control: (888) 426-4435. The ASPCA says it is available 24/7, 365 days a year, and that a consultation fee may apply.3
  • Pet Poison Helpline: (855) 764-7661, also listed by the AVMA.2

Our advice: have the wrapper handy when you call, and estimate how much your dog ate and how much your dog weighs.

Why chocolate is dangerous

The ASPCA explains that chocolate contains substances called methylxanthines, which are also found in coffee and caffeine.1 The AVMA says chocolate is toxic to both dogs and cats.2

Which chocolate is worst

The ASPCA says the darker the chocolate, the more dangerous it is. White chocolate has the lowest methylxanthine content, while baking chocolate and cocoa powder have the highest.1

Type Relative risk (per the ASPCA)1
Baking chocolate, cocoa powder Highest
Dark chocolate High
Milk chocolate Lower than dark
White chocolate Lowest

Lower risk doesn’t mean safe. Size matters too: the same piece of chocolate is a bigger dose for a small dog than a large one. Let a professional decide whether it’s an emergency.

Watch for xylitol, too

Many sugar-free candies, gums and baked goods contain xylitol. The ASPCA says it can cause low blood sugar and possibly liver damage in dogs, with early signs such as vomiting, lethargy and loss of coordination.1 Check labels on anything “sugar-free.”

Dog-proof the holidays

Our advice:

  • Keep candy dishes, advent calendars and wrapped gifts with chocolate off low tables and out from under the tree.
  • Store baking chocolate and cocoa powder in a closed cabinet.
  • Ask guests to keep bags and coats with candy off the floor.

Checklist

  • Save (888) 426-4435 and your vet’s number in your phone.
  • Darker chocolate is more dangerous; baking chocolate and cocoa are the worst.
  • Check “sugar-free” labels for xylitol.
  • Keep sweets up high and gifts with chocolate away from the tree.

Sources & method

How we researched this

  • This is a research-based guide, not a hands-on product test.
  • Every measurement and safety figure is attributed to the source it comes from. Where we give our own advice, we say so.
  • We don’t rank or recommend specific products in this guide.

Sources

  1. People Foods to Avoid Feeding Your Pets, ASPCA. Accessed Nov 9, 2026.
  2. Winter holiday pet safety, American Veterinary Medical Association. Accessed Nov 9, 2026.
  3. ASPCA Animal Poison Control, ASPCA. Accessed Nov 9, 2026.

Review history

  • Published Nov 9, 2026.