Is Chocolate Bad for Cats?

Although it's more common to hear stories of dogs getting sick from chocolate ingestion, chocolate can also pose a serious health risk to cats, even becoming fatal if too much is eaten.

Why Is Chocolate Bad for Cats?

Although sugar, fat, and xylitol (a sugar substitute) aren't good for cats either, chocolate contains two ingredients that pose a threat to an animal's health: caffeine and theobromine, a plant alkaloid that occurs naturally in cacao. Theobromine in particular is a proven toxin for most animals, including cats, as noted in a study published by the journal Frontiers in Pharmacology.

The Latin name for the cocoa plant is Theobroma cacao, meaning "food for the gods," and the roasted beans do make a yummy treat, but what makes chocolate so delightful for humans is exactly what makes it so dangerous for pets.

Why Are These Ingredients so Dangerous for Animals?

The two main culprits, caffeine and theobromine, are stimulants. Caffeine, found in many food and drink items besides chocolate, becomes toxic when absorbed into your cat's body, leading to "vomiting, diarrhea, increased thirst, restlessness and an increased heart rate," explains Banfield Pet Hospital. Theobromine causes similar symptoms when ingested.

How Much Chocolate Is Too Much?

Any amount of chocolate is too much for your cat. All forms of chocolate are hazardous to your furry friend, such as dry cocoa powder and baking chocolate (most toxic due to their high level of theobromine), dark, semi-sweet, and milk chocolate, and even white chocolate, with its low percentage of cocoa.

However, the level of toxicity depends on how much they ingest and what kind. For a ten-pound cat, notes Petful, one square of unsweetened baking chocolate can do as much harm to your kitty as twenty-three wrapped milk chocolate drops. You should avoid letting your cat eat small amounts of chocolate, as any amount may cause illness.

Help — My Cat Ate Chocolate! What Symptoms Should I Watch For?

As you would with any medical emergency, immediately bring your cat to the vet or animal emergency room to determine the extent of the poisoning and to receive treatment. After treatment, continue to monitor your cat for any other ill effects to ensure it is completely out of her system. A few side effects of chocolate toxicity are listed above, but there can be a range of signs ranging from mild to severe: 

• Vomiting
• Diarrhea
• Nausea
• Increased heart rate
• Excessive thirst
• Excessive urination
• Hyperactivity
• Restlessness
• Increased body temperature
• Rapid breathing or panting
• Muscle tremors or twitching
• Low blood pressure
• Seizures
• Coma

As you would with any medical emergency, immediately bring your cat to the vet or animal emergency room to determine the extent of the poisoning and to receive treatment. After treatment, continue to monitor your cat for any other ill effects to ensure it is completely out of her system.