Can Mold Affect Pets?: Causes, Symptoms & Treatment

By:    |   Published March 4, 2025
A golden retriever sick from mold exposure

Just like you, your dog, cat, or even bird can have a reaction to household mold exposure. And, just like you, their reaction can range from mild to devastating. 

This article will answer the question “Can mold affect pets?” and provide you with the main causes and symptoms of mold exposure and some prevention tips.

Can Mold Affect Pets?

Yes, mold can affect pets. Exposure can be through inhalation, ingestion, or allergies. Symptoms include difficulty breathing, vomiting, and excessive scratching.

If you notice any of these symptoms of mold exposure, bring your pet to your local vet as soon as you can.

Symptoms of Mold Exposure in Pets

There are a variety of ways mold can affect your pets. Exposure can be through inhalation, ingestion, or allergies, and the symptoms are diverse.

Inhalation Symptoms

Mold produces allergens, irritants, and sometimes toxic mycotoxins, which can trigger a variety of reactions. Although mold spores are found everywhere, pets are naturally curious and can inhale thousands of spores by sniffing a mold patch directly.

The symptoms of mold inhalation include:

  • Difficulty breathing
  • Wheezing, sneezing, or coughing
  • Nasal discharge
  • Lethargy
  • Nose and/or mouth bleeding

Ingestion Symptoms

Pets can ingest mold by eating contaminated food or substances. Moldy foods often contain “root” threads that penetrate deeply and can also host invisible bacteria along with the mold. Dogs are especially prone to consuming moldy substances, such as poorly stored pet food, trash, or discarded food found during walks. 

Ingesting moldy food can lead to the following symptoms:

  • Decreased appetite
  • Vomiting
  • Stool changes (sometimes with blood)
  • Tremor
  • Seizures

Allergic Reactions

Prolonged exposure to mold increases the likelihood of dogs and other pets developing mold-related allergies. These allergies commonly appear in dogs under three years old but can affect pets of any age. 

Symptoms may include:

  • Excessive scratching, licking, biting, or chewing
  • Inflamed or irritated skin
  • Skin dryness and scaliness
  • Fur loss
  • Unnatural skin odor

How to Treat Mold Exposure in Dogs and Other Pets?

If you suspect your pet has been exposed to mold, immediate veterinary care is crucial, especially with mycotoxin-producing molds that can lead to severe health issues. A veterinarian will assess your pet’s condition and determine the best course of action to mitigate the effects of mold exposure. 

Treatment typically begins by eliminating the toxic substance. Depending on the severity, the vet may induce vomiting, perform gastric lavage under anesthesia, or administer activated charcoal to limit toxin absorption. Additional steps, such as cathartic medication to promote bowel movements and intravenous fluids, can help stabilize your pet.  

In advanced cases, further treatment may involve medications to manage symptoms. Identifying and removing the source of mold in your environment is essential to prevent future exposure and safeguard your pet’s health.

A vet examining if a golden retriverer has been exposed to mold

What Molds Are Dangerous for My Pets?

While not all mold species are harmful, the presence of visible mold is always a warning sign. It’s nearly impossible to identify mold types without testing, so any mold should be treated as a potential hazard to your pet’s health.

The most common types of mold that are especially dangerous fall into five categories: Cladosporium, Penicillium, Fusarium, Aspergillus, and Stachybotrys (commonly known as black mold). These molds are toxic and pose serious health risks to both pets and humans.

If you suspect mold in your home, act quickly to ensure the safety and well-being of your pet.

A basement wall with mold by EverDry Toledo

This image has been taken from our Photo Gallery.

How to Remove Mold From Your Home?

The approach to mold cleanup depends on the extent of the problem. In general, if the affected area is less than 10 square feet, you can handle it yourself by scrubbing hard surfaces with detergent and water and then drying them completely.

For larger infestations, professional help is recommended. One thing to keep in mind is that mold will continue to return unless you address the underlying moisture issue that is causing its growth.

A person scrubbing a moldy wall with a brush

Tips to Keep Your Pet Safe from Mold

Mold exposure in dogs and other pets can be avoided by taking preventive measures such as storing pet food safely and cleaning toys and beds regularly.

Keep Your Pets Away From Mold

Preventing your pet’s exposure to mold begins with vigilance. If you notice mold in your home, make sure to keep your pet away from that area until you remove the mold completely.

Keep Food, Water, and Toys Safe

Always store your pet’s food in airtight containers to prevent mold growth. Regularly wash and dry pet toys to prevent mold from developing on them. Moldy food or toys can quickly lead to health problems. Water bowls and toys should be cleaned once a week.

Keep Anything Your Pet Touches Clean and Dry

Items your pet frequently uses, such as beds, blankets, or grooming tools, should be cleaned and thoroughly dried often. This reduces the chances of mold developing on damp materials, creating a healthier environment for your pet.

Keep Your Pet From Eating Out of the Trash

Pets are naturally curious, but trash can contain moldy food and other hazardous items. Use secure, pet-proof trash bins to prevent them from accidentally ingesting harmful moldy food.

Inspect and Remediate Mold Quickly

Since the answer to the question “Can mold affect pets?” is positive, at the first sign of mold, you should take action to locate and address the source. Professional mold remediation is often the safest option to ensure thorough removal. Delaying treatment not only risks your pet’s health but also allows mold to spread further in your home.

Keep Your Home Dry

Keeping your home dry is one of the best ways to avoid the risks of mold exposure in dogs and other pets. Here are some tips from our basement waterproofing experts at EverDry Toledo.

  • Dehumidifiers: Use dehumidifiers to reduce moisture levels in damp areas.
  • Improve Ventilation: Ensure proper airflow by opening windows or installing air filters in your HVAC system.
  • Replace Carpeting: Swap carpets for hard flooring in moisture-prone spaces.
  • Fix Plumbing Leaks: Repair leaks quickly to prevent water damage and mold growth.
  • Fix Cracks in the Foundation: Seal foundation cracks to block moisture entry.
  • Don’t Leave Cardboard Boxes Laying Around: Remove cardboard boxes, as they absorb moisture and promote mold.
  • Clean and Inspect HVAC Systems Regularly: Maintain HVAC systems to improve air circulation.
  • Consider Basement Waterproofing: Invest in waterproofing to keep your basement dry and mold-free.
A basement wall crack with moisture stains

This image has been taken from our Photo Gallery.

Frequently Asked Questions

Learn more about mold and pets.

What Is Mold?

Mold is a type of fungus that grows in damp environments. It reproduces by releasing spores into the air, which can spread to various surfaces. While some molds are harmless, others produce mycotoxins that can pose serious health risks to pets and humans.

Can Mold Affect Dogs’ Behavior?

Yes, mold exposure can impact a dog’s behavior and health. Symptoms like excessive scratching, decreased appetite, and tremors may indicate mold-related issues.

Can Cats Smell Mold?

Cats are highly sensitive to mold and can detect its presence. However, exposure to mold spores may affect their health. Ensuring a mold-free environment is essential for their well-being.

Where Does Mold Hide?

Mold often grows in hidden, damp areas, such as attics, basements, bathrooms, behind walls, kitchens, and laundry rooms. Regularly inspect and clean these spaces to prevent mold growth and protect your home and pets.

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After you’ve taken your pet to the vet, it’s time to call in an expert for your home. If you suspect that mold may be invading your home, Team EverDry is here to help! Contact us online or give us a call at (419) 841-6055 to schedule a free 20-point basement inspection!

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