My Pet Ate Mistletoe, What Do I Do?

Holiday decorations can make a home feel festive and warm, but some seasonal plants can pose a risk to pets. If your cat or dog has gotten into mistletoe, it is important to understand what steps to take and when to seek veterinary care.

At Countryside Animal Hospital, we believe that informed pet owners are empowered pet owners. Here is what you need to know if your pet ate mistletoe, including symptoms to watch for and how to keep your pet safe during the holidays.

Is Mistletoe Toxic to Cats and Dogs?

Yes, mistletoe can be toxic to both cats and dogs, though the severity depends on the type of mistletoe, the amount eaten, and your pet’s size and health. The most common types include American mistletoe and European mistletoe, both of which contain compounds that can irritate the gastrointestinal system and affect the cardiovascular and nervous systems.

What Happens If My Pet Ate Mistletoe?

If your dog or cat ate mistletoe, symptoms may appear within a few hours. Common signs include the following:

• Drooling
• Vomiting
• Diarrhea
• Decreased appetite
• Lethargy

In more serious cases, particularly if a large amount was ingested, pets may experience:

• Difficulty breathing
• Abnormal heart rate
• Low blood pressure
• Tremors or seizures

Cats tend to be more sensitive to plant toxins than dogs, but curious dogs may consume larger amounts. Regardless of species, any ingestion should be taken seriously.

What Should I Do Right Away?

1. Remove access immediately. Take away any remaining mistletoe, and keep your pet from eating more. 
2. Check for symptoms. Note any vomiting, drooling, or changes in behavior. 
3. Call your veterinarian. Even if symptoms are mild, it is best to get professional guidance.

When Is Mistletoe an Emergency?

While many cases are mild, mistletoe ingestion can become an emergency if your pet shows severe symptoms, such as collapse, seizures, breathing difficulty, or persistent vomiting. Small dogs, puppies, kittens, and pets with underlying health conditions may be at higher risk.

If you are unsure how much mistletoe your pet ate, or if symptoms are progressing, it is always safer to err on the side of caution.

Why Do Pets Eat Mistletoe?

Dogs often eat plants out of curiosity or boredom, while cats may chew on greenery due to natural hunting or play instincts. Hanging mistletoe decorations can be especially tempting for a climbing cat or a tall dog.

How Can I Prevent This From Happening Again?

Prevention is the best protection for your pet. Consider these tips during the holiday season:

• Avoid using real mistletoe in your home
• Keep all decorative plants out of reach of cats and dogs
• Choose pet safe holiday decorations
• Supervise pets during gatherings and parties
• Provide appropriate toys and enrichment to reduce boredom

Artificial mistletoe can still pose a choking or obstruction risk, so placement matters, even if the plant is not real.

The Bottom Line

If your pet ate mistletoe, do not panic, but do not ignore it either. While many cats and dogs experience only mild symptoms, mistletoe ingestion can become serious depending on the circumstances. Quick action and veterinary guidance make all the difference.

The holidays should be joyful for every member of your family, including the four legged ones. If you are ever unsure about a potential toxin or your pet’s health, Countryside Animal Hospital is here to support you with compassionate, knowledgeable care.