Can Dogs Get COVID from Humans? Symptoms, Prevention, and Care

Medically Reviewed and Compiled by Dr. Adam N. Khan, MD.

Quick Summary:

• Yes, transmission is possible: Dogs can catch SARS-CoV-2 (the virus that causes COVID-19) from infected humans during close contact, though cases remain relatively rare.
• Symptoms are usually mild: Affected dogs typically present with mild respiratory or gastrointestinal signs, such as a dry cough, nasal discharge, lethargy, or brief loss of appetite.
• Isolate and protect: If you test positive for COVID-19, avoid close contact with your dog, wear a mask around them, and have another family member care for them until you recover.

EMERGENCY WARNING: If your dog develops severe respiratory distress—such as rapid breathing, open-mouth panting while at rest, blue or pale gums, or extreme lethargy—contact your veterinarian or local emergency animal hospital immediately.

Understanding COVID-19 Transmission Between Humans and Dogs

When the SARS-CoV-2 pandemic began, scientists worked quickly to understand how the virus affected domestic animals. Extensive surveillance by health agencies around the globe confirmed that dogs can indeed contract SARS-CoV-2 from humans who are infected with the virus.

Dogs are classified as susceptible companion animals, meaning they possess the cellular receptors (specifically the ACE2 receptor) that allow the virus to dock and replicate in small amounts. However, because their ACE2 receptors differ slightly from human receptors, the virus typically does not replicate as efficiently in dogs as it does in humans.

Human-to-dog transmission occurs through respiratory droplets released when an infected person coughs, sneezes, talks, or breathes close to their pet. Activities like letting your dog sleep in your bed, kissing your pet, sharing food, or allowing them to lick your face significantly increase the risk of transferring the virus from your respiratory tract to theirs.

Can Your Dog Pass COVID-19 Back to You?

According to public health agencies including the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC), companion animals do not play a significant role in spreading SARS-CoV-2 back to humans. The risk of dog-to-human transmission is considered extremely low. While humans shed large amounts of virus into their surroundings, infected dogs shed much smaller viral loads for much shorter periods.

Symptoms of COVID-19 in Dogs

In many cases, dogs infected with SARS-CoV-2 show no symptoms at all (asymptomatic infection). When dogs do develop symptoms, the clinical course is typically mild and self-limiting, resolving within a few days to two weeks.

Common Mild Respiratory and Digestive Signs

• Dry Cough: A mild, persistent hacking cough.
• Nasal Discharge: Clear or cloudy runny nose.
• Sneezing: Intermittent sneezing spells.
• Lethargy: Reduced energy levels or unusual tiredness.
• Loss of Appetite: Reluctance to eat or drinking less water.
• Gastrointestinal Symptoms: Brief episodes of mild vomiting or diarrhea.

How SARS-CoV-2 Differs from Canine Infectious Respiratory Disease Complex (CIRDC)

It is crucial to distinguish SARS-CoV-2 infection from common canine respiratory illnesses like Kennel Cough (Bordetella bronchiseptica) or Canine Influenza Virus. Kennel Cough usually produces a harsh, “goose-honk” cough and spreads rapidly in kennels, dog parks, or daycare centers. SARS-CoV-2, on the other hand, is almost always tied directly to a known human COVID-19 household case.

Unique Clinical Takeaways

Beyond standard symptom checklists, clinical observations from veterinary epidemiologists and companion animal research offer critical management insights:

1. Viral Load and Duration of Contact Drive Susceptibility: Transmission to dogs relies heavily on contact intensity rather than casual exposure. Dogs living in small, poorly ventilated indoor spaces with infected humans who engage in close physical bonding (e.g., sleeping together, hugging, facial licking) show significantly higher seroprevalence (antibody levels) compared to dogs whose owners practice basic distance and hygiene during isolation.
2. Pre-Existing Airway and Brachycephalic Vulnerabilities: Dogs with pre-existing chronic conditions—such as canine chronic bronchitis, heart failure, or brachycephalic syndrome (flat-faced breeds like Bulldogs, Pugs, and French Bulldogs)—are at heightened risk for compounded respiratory distress if infected with SARS-CoV-2. Secondary inflammatory responses can trigger airway collapse or breathing difficulty faster than in non-brachycephalic breeds.
3. Fecal-Oral Exposure via Fur and Environment: While airborne respiratory droplets are the primary route of transmission, dogs frequently groom their fur after being in contact with human respiratory droplets on furniture, bed sheets, or clothes. Veterinary studies suggest that environmental contamination on a dog’s coat can lead to accidental ingestion of viral particles during self-grooming, occasionally explaining gastrointestinal symptoms without major lung involvement.

Diagnosis, Care, and Recovery

If you suspect your dog has been exposed to COVID-19 and is exhibiting symptoms, do not immediately take them to a veterinary clinic without calling ahead. Unannounced visits risk exposing other animals and staff to potential pathogens.

Diagnostic Testing

Veterinarians diagnose SARS-CoV-2 using specialized real-time reverse transcription-polymerase chain reaction (rRT-PCR) testing on nasal or oral swabs. However, testing is rarely routinely performed unless part of official public health surveillance or required for pre-travel clearance. In most cases, veterinarians diagnose and treat based on known exposure history and clinical evaluation.

Home Isolation and Supportive Care

Treatment for dogs infected with SARS-CoV-2 focuses almost entirely on supportive care:

• Rest and Isolation: Keep your dog isolated at home. Do not bring them to dog parks, pet stores, or groomers until at least 14 days after their symptoms resolve or until a veterinarian clears them.
• Hydration: Ensure continuous access to clean, fresh water.
• Comfortable Environment: Provide a quiet, warm, and draft-free resting space away from family members and other pets.
• Dietary Support: Offer simple, bland meals (such as plain boiled chicken and white rice) if mild gastrointestinal upset occurs.

Caution: Never administer over-the-counter human medications—such as acetaminophen, ibuprofen, or aspirin—to your dog. These medications are extremely toxic to pets and can cause fatal organ failure.

Prevention Strategies for Pet Owners

Preventing transmission to your dog involves implementing straightforward hygiene practices whenever someone in the household tests positive or exhibits symptoms of COVID-19.

Step-by-Step Isolation Guidelines

• Designate a Healthy Caregiver: Have an uninfected household member handle feeding, walking, and playing with your dog.
• Minimize Contact: Avoid petting, cuddling, kissing, sharing food, or sleeping in the same bed with your pet while you are symptomatic or testing positive.
• Wear a Mask and Wash Hands: If you live alone and must care for your dog while sick, wear a well-fitted mask and wash your hands thoroughly with soap and water before handling their food, water, or leash.
• Maintain Outdoor Safety: When taking your dog outside for bathroom breaks, keep them on a leash and maintain distance from other people and animals.

Frequently Asked Questions (FAQs)

Reviewer Bio & Medical Disclaimer

Reviewer Bio:

Dr. Adam N. Khan, MD, is a board-certified physician specializing in internal medicine and public health education. He has no financial conflicts of interest or commercial affiliations related to the veterinary or pharmacological products discussed in this article.