Is Dark Chocolate or Milk Chocolate Worse for Dogs? 

If you have ever caught your dog sneaking a few bites of chocolate left out on the counter or stolen straight from the Halloween stash, you may have wondered how toxic it really is for them. While most pet owners know chocolate can be harmful to dogs, an important follow-up question is whether dark chocolate is more toxic than milk chocolate. It is crucial to understand both the type and quantity of chocolate that can be harmful to your furry friend’s health. Below, we’ll explore the comparative dangers of dark versus milk chocolate for dogs so you can keep your furry friend safe.  

Dark Chocolate vs. Milk Chocolate  

Chocolate is a beloved treat for many people, but when it comes to dogs, it can spell disaster. Dogs are highly susceptible to chocolate toxicity. This is because chocolate contains theobromine and caffeine, both of which are harmful to canines. Theobromine, a stimulant, affects the nervous system, cardiovascular system, and gastrointestinal tract in dogs. The level of danger a dog faces after consuming chocolate depends on several factors, such as the type of chocolate ingested, the size of the dog, and the amount consumed.  

Dark chocolate, with its higher cocoa content, contains more theobromine and is therefore more toxic than milk chocolate. However, milk chocolate still poses a threat to dogs. Small dogs or those with certain health conditions are especially vulnerable. Even the ingestion of small amounts of chocolate can cause adverse effects.  

Symptoms of Chocolate Poisoning  

If your dog eats chocolate, they can suffer from poisoning. Symptoms can appear within 6 to 12 hours after ingestion. The dosage and type of chocolate will determine the severity of the clinical signs, and these can include:  

  • Tremors in the muscles and limbs  
  • Seizures  
  • Irregular heartbeats  
  • Agitation/restlessness  
  • Increased heart rate  


Contact your veterinarian and Pet Poison Helpline at (855) 764-7661 if you suspect your dog has consumed chocolate. Transport your dog to the veterinary clinic so your veterinarian can determine and administer the appropriate treatment. This can include inducing vomiting and administering activated charcoal to bind the toxins. Depending on the severity of the situation, your veterinarian may also administer IV fluids, anti-diarrhea medications, and other specific treatments. If you have any further concerns or inquiries about chocolate poisoning and its effects on pets, please don’t hesitate to contact Pet Poison Helpline.