Can Dogs Eat Garlic?

Garlic is a topic of debate when it comes to dogs and their diet. In small amounts, garlic can offer some health benefits to dogs, such as enhancing immune function and having antifungal and antibacterial properties. However, garlic belongs to the Allium family (which also includes onions, chives, and leeks), and these plants can be toxic to dogs in larger quantities.

The toxic dose depends on several factors, including the dog’s size, health, and the form of garlic consumed (raw, cooked, or powdered). Garlic toxicity can lead to symptoms like vomiting, diarrhea, weakness, and, in severe cases, hemolytic anemia (a dangerous condition where red blood cells are destroyed faster than they can be made).

The general consensus among veterinarians is that the risks associated with garlic feeding often outweigh the potential health benefits, especially since the exact safe amount can vary so much from one dog to another. If you’re considering adding garlic to your dog’s diet for any reason, it’s best to consult with your vet first to ensure it’s safe for your specific dog and to discuss what an appropriate amount might be.

Can Dogs Eat Garlic?

In general, it’s best to avoid giving garlic to dogs due to the risk of toxicity, which can lead to health issues like gastrointestinal upset and anemia. If you’re considering it for health benefits, consult your vet first.

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How Much Garlic Is Toxic to Dogs?

Scientific studies have found that it takes roughly 15 to 30 grams of garlic per kilogram of a dog’s body weight to cause toxic effects. Considering the average garlic clove weighs between 3 and 7 grams, a dog would need to ingest a substantial amount for severe toxicity. However, sensitivity varies by dog, and even smaller amounts eaten over several days can be harmful. Accidental small ingestions might not cause issues, but it’s advised not to intentionally feed garlic to your dog.

Can I Feed My Dog Garlic Bread?

Feeding your dog garlic bread is not recommended. While it might seem tempting due to its appealing aroma, garlic bread contains ingredients that can be harmful to dogs. These include not only garlic, which can be toxic in certain amounts, but also high levels of butter, oil, and potentially cheese and seasonings such as onion powder, which can upset your dog’s stomach. Garlic bread is also high in calories and fats, providing no nutritional benefits to your pet and potentially contributing to obesity. It’s best to stick to foods and treats designed specifically for dogs to ensure their health and well-being.

Can I Feed My Dog Garlic Supplements?

Feeding your dog garlic supplements is a topic that requires careful consideration due to garlic’s known toxicity to dogs. While some sources and dog owners advocate for the use of garlic supplements as part of a natural wellness regimen or as a flea and tick preventative, the evidence supporting these benefits is not consistent. Although very small doses of garlic might be safe for most dogs, the potential risks and the lack of conclusive evidence regarding its benefits should not be overlooked.

Given the potential for toxic effects from incorrect dosing, it’s crucial to consult with your veterinarian before introducing garlic supplements into your dog’s diet. A veterinarian can help you assess whether garlic supplements could be beneficial for your dog and, if so, determine the appropriate, safe dosage. Ultimately, the decision to use garlic supplements should be made in collaboration with a professional, ensuring it aligns with the best health plan for your dog.

Why Is Garlic Bad For Dogs?

Garlic is harmful to dogs primarily because it contains a compound called thiosulfate, which is not toxic to humans but poses significant risks to dogs. Thiosulfate can damage a dog’s red blood cells, which are crucial for transporting oxygen throughout the body. This damage impairs the blood cells’ ability to deliver oxygen, leading to symptoms such as weakness and lethargy in affected dogs. In addition to the risk of anemia from the destruction of red blood cells, ingestion of garlic can also cause gastrointestinal issues in dogs. These potential health problems underscore the importance of keeping garlic, and foods containing it, away from dogs.

Why Do Dog Owners Avoid Garlic?

Dog owners often avoid garlic because it’s part of the Allium family, which also includes onion, leek, chive, and shallot—plants known for containing sulfur-based compounds. Among these, garlic does contain some beneficial properties that might seem appealing for dog health. However, the concern arises from thiosulfate, a compound found more abundantly in other Allium members like onions, leeks, chives, and shallots, but present in garlic as well. This compound is not harmful to humans but is toxic to dogs.

Thiosulfate can cause oxidative damage to a dog’s red blood cells, leading to the formation of Heinz bodies. These are damaged cells that the dog’s body identifies as foreign and expels from the bloodstream. The resulting condition, if the garlic intake is significant and ongoing, can lead to hemolytic anemia. This condition is characterized by the destruction of red blood cells faster than they can be produced, which can be life-threatening. Due to these risks, many dog owners choose to err on the side of caution and exclude garlic from their pet’s diet altogether to prevent potential health issues.

What Are The Signs Of Garlic Poisoning In Dogs?

If you’re concerned that your dog might have ingested garlic, it’s important to watch for signs of garlic poisoning and contact your vet for advice. The symptoms can vary and might take some time to become apparent. Here are key signs to look out for:

  • Lethargy: Your dog may appear unusually tired or sluggish.
  • Abdominal pain: Signs of discomfort or pain in the belly area, which might include whining or reluctance to move.
  • Vomiting: An immediate reaction to expel the toxic substance.
  • Diarrhea: Gastrointestinal upset resulting in loose or watery stools.
  • Drooling: Excessive salivation can be a sign of nausea or oral irritation.
  • Panting: Unusual or excessive breathing might indicate distress.
  • Weakness: Generalized weakness or a lack of energy and strength.

It’s crucial to remember that the symptoms of garlic poisoning might not manifest immediately. Even if your dog appears to be fine shortly after ingesting garlic, symptoms can develop over the following days. Therefore, if you suspect your dog has consumed garlic, it’s better to be cautious and consult your vet without delay, rather than waiting for symptoms to appear.

Treating Garlic Toxicity in Dogs

If your dog ingests a significant amount of garlic, the immediate step is to seek veterinary care. While garlic and onion poisoning are not often fatal in dogs, they can cause discomfort and health complications that require medical attention. Here’s what you might expect in terms of treatment:

  • Intravenous Fluids: To combat dehydration and ensure your dog remains hydrated, your veterinarian may administer IV fluids. This is especially important if your dog has been vomiting or experiencing diarrhea.
  • Medication for Vomiting: If your dog is vomiting, the vet might prescribe medication to control this symptom and provide relief.
  • Blood Transfusions: In severe cases of garlic toxicity, where there is significant damage to the red blood cells leading to anemia, blood transfusions may be necessary to stabilize your dog’s condition.

The key is prompt action. Even if the symptoms seem mild or delayed, getting professional advice and treatment early can help ensure the best outcome for your pet.

Alternatives To Garlic For Dogs

If you’re looking for alternatives to garlic that can provide health benefits without the risks of toxicity, there are several safe and beneficial options for dogs. These alternatives can support various aspects of your dog’s health, including immune function, flea and tick prevention, and overall well-being:

  • Probiotics: These beneficial bacteria support gut health, aid digestion, and can boost the immune system.
  • Fatty Acids: Omega-3 and Omega-6 fatty acids, found in fish oil and flaxseed oil, can promote healthy skin and coat, reduce inflammation, and support heart health.
  • Pumpkin: Rich in fiber, pumpkin can help with digestive regularity and is great for dogs with sensitive stomachs.
  • Carrots: A crunchy, low-calorie treat rich in beta-carotene and fiber, carrots can support dental health and provide important vitamins.
  • Apples (without seeds): Apples are a good source of vitamins A and C, and fiber, making them a healthy snack in moderation. Just make sure to remove the seeds and core.
  • Blueberries: Packed with antioxidants, blueberries support the immune system and can help prevent cell damage.
  • Lean Meats: Cooked, unseasoned lean meats like chicken, turkey, and beef are excellent protein sources for dogs.
  • Sweet Potatoes: High in dietary fiber and rich in vitamins, sweet potatoes are another healthy treat option.
  • Coconut Oil: In small amounts, coconut oil can promote a healthy coat, provide energy, and help improve digestion.
  • Brewer’s Yeast: Often recommended as a natural flea deterrent, brewer’s yeast is also a good source of B-vitamins.

When considering adding any new food to your dog’s diet, it’s important to introduce it gradually and monitor for any adverse reactions. Additionally, consulting with your veterinarian can ensure that any new addition is suitable for your dog’s specific health needs and dietary requirements.

If garlic is poisonous to dogs, why do some experts still recommend it?

The recommendation of garlic for dogs by some experts, despite its known toxicity, stems from the belief that in very small quantities, garlic might offer benefits without causing harm. This perspective is based on the notion that garlic contains nutrients that could potentially support a dog’s health, including immune function and acting as a natural flea deterrent.

However, the critical issue with this approach lies in determining what constitutes a “safe” quantity of garlic. The tolerance level can significantly vary between individual dogs, depending on factors such as size, breed, and overall health, making it challenging to establish a universally safe dosage. Given the difficulty in pinpointing a non-toxic amount and the potential risks involved, many veterinarians and pet health experts advise against feeding garlic to dogs altogether.

It’s important to note that dogs should receive all necessary vitamins and minerals from a complete and balanced diet, making supplementation unnecessary in most cases. If you’re considering adding anything to your dog’s diet for health benefits, it’s always best to consult with a veterinarian to ensure it’s safe and appropriate for your pet’s specific needs. Additionally, familiarizing yourself with a list of harmful foods for dogs can help prevent accidental ingestion of toxic substances.

How Does Garlic Help Dogs?

Garlic has been attributed with various health benefits for dogs, largely based on its properties and effects observed in humans and its traditional use in natural veterinary practices. Here are the key ways garlic is believed to help dogs:

  • Improves Circulation: Garlic’s pungent nature warms the body and helps move energy upwards and outwards, enhancing circulation. This can be particularly beneficial for the lungs, large intestine, spleen, and stomach.
  • Detoxifies the Body: It supports the detoxification process by promoting the growth of beneficial bacteria in the digestive tract while eliminating harmful ones. This makes garlic a valuable addition during fall, winter, and early spring to balance the digestive system.
  • Liver Support: Garlic aids in breaking down wastes before they enter the bloodstream and supports nutrient assimilation and waste elimination throughout the digestive tract. Its detoxifying effects help the liver rid the body of toxins.
  • Prevents Blood Clots and Lowers Cholesterol: Garlic acts as an anti-platelet agent, reducing the formation of blood clots, and has anticholesterolemic properties that decrease cholesterol buildup. It also functions as a vasodilator, widening blood vessels and potentially reducing blood pressure.
  • Anti-cancer and Immune System Support: Garlic is recognized for its potential anti-tumor properties and ability to stimulate the lymphatic system, aiding in waste removal. Its antibiotic, anti-fungal, and anti-parasitic properties make it a natural choice for addressing infections and deworming.
  • Flea and Tick Repellent: Feeding garlic to dogs during flea and tick season may help repel these pests. It is thought that sulfur compounds in garlic, excreted through the dog’s skin, act as a natural repellent.
  • General Health Benefits: Similar to effects observed in humans, garlic in dogs is believed to boost immunity, protect against common colds, reduce blood pressure, lower cholesterol, and reduce internal inflammation, which lowers the risk of cardiac diseases. It may also help detoxify heavy metals in the body.

It’s crucial to note that despite these potential benefits, the use of garlic in dogs remains controversial due to the risk of toxicity. The amount of garlic considered safe can vary significantly between individual dogs. Therefore, it’s essential to consult with a veterinarian before adding garlic to your dog’s diet, especially considering that dogs can typically obtain all necessary nutrients from a well-balanced diet without the need for supplements. Additionally, it’s important to be aware of any possible contraindications with medications your dog may be taking.

How Much Garlic Can Dogs Eat Daily?

When considering incorporating garlic into your dog’s diet for medicinal purposes, it’s essential to approach the dosage with caution to avoid potential toxicity. Here are guidelines on how much garlic you can safely give your dog daily, acknowledging that moderation is key:

According to Juliette de Bairacli Levy’s dosage recommendations in “The Complete Herbal Book for the Dog,” the suggested daily amounts are as follows:

  • Dogs weighing 10 to 15 pounds: ½ clove of garlic
  • Dogs weighing 20 to 40 pounds: 1 clove of garlic
  • Dogs weighing 45 to 70 pounds: 2 cloves of garlic
  • Dogs weighing 75 to 90 pounds: 2½ cloves of garlic
  • Dogs weighing 100 pounds and over: 3 cloves of garlic

A more conservative approach is advised by a 2008 report from the National Research Council, which provides an estimated presumed safe intake (PSI) for dogs based on available research:

  • For a 50 lb. dog, the PSI is about 1.2 g or 0.045 ounces/day, equivalent to approximately ½ clove of garlic per day.

If you prefer to use measuring spoons for garlic dosage, the following amounts of raw garlic per day can be included in your dog’s diet, based on their weight:

  • 5 lbs: ⅙ teaspoon
  • 10 lbs: ⅓ teaspoon
  • 15 lbs: ½ teaspoon
  • 20 lbs: ⅔ teaspoon
  • 30 lbs: 1 teaspoon

It’s important to start with smaller amounts and gradually increase to the full dosage, rather than starting with the full dose right away. This cautious approach helps in monitoring your dog’s reaction to garlic. Additionally, offering garlic in a way that allows your dog to self-select (placing the properly dosed garlic beside their food bowl) can be a method to let them choose if they need it.

Remember, these guidelines serve as general recommendations, and individual dogs may react differently to garlic. Always consult with your veterinarian before introducing garlic or any new supplement into your dog’s diet, especially to ensure it does not interact with any existing conditions or medications.

The Preparation of Garlic for Dogs

Incorporating garlic into your dog’s diet for its potential health benefits, especially for boosting immunity, requires careful preparation and consideration. Here’s how you can prepare garlic for dogs, along with important precautions:

Preparing Fresh Garlic

  • Choose Fresh and Organic Garlic: Opt for fresh, organic garlic bulbs over canned, cooked, or processed garlic. Fresh garlic is more potent and free from additives and preservatives that could harm your dog.
  • Peel and Prepare: Gently peel the garlic clove, then mince, chop, or crush it. It’s crucial to use the garlic within 10 minutes of peeling and preparing it to ensure that its medicinal properties are at their peak. Pre-peeled and jarred garlic often loses its medicinal qualities and should be avoided.
  • Introduce Slowly: When adding garlic to your dog’s diet, start with a small amount and gradually increase it over several days. This gradual introduction allows your dog to adjust to the taste and reduces the chance of digestive upset.

Caution and Considerations

While garlic can offer benefits, there are several instances where caution is necessary:

  • Drug Interactions: Garlic can interact with various medications. If your dog is on heart medication, immunosuppressants, chemotherapy, blood thinners, medication for blood pressure, or insulin therapy, consult your vet before introducing garlic.
  • Pre-existing Conditions: Avoid garlic if your dog has a history of anemia or other health conditions that garlic might exacerbate.
  • Breed Sensitivity: Some breeds, particularly Japanese breeds like the Shiba Inu and Akita, are more sensitive to garlic. If you own a breed known for its sensitivity, consult your veterinarian to determine if garlic is safe for your pet and in what amount.
  • Consultation with a Veterinarian: Regardless of your dog’s breed or health status, it’s wise to consult with a veterinarian before adding garlic or any new supplement to your dog’s diet. A vet can provide personalized advice based on your dog’s specific health needs and dietary requirements.

In short, while fresh garlic can be a beneficial addition to your dog’s diet for its immune-boosting properties, it’s essential to prepare it correctly and be mindful of the potential risks and interactions. Always prioritize your dog’s safety and health by seeking professional guidance before making dietary changes.


In conclusion, while the potential health benefits of garlic for dogs, such as immune system support and natural flea repellency, can make it an appealing supplement, it’s crucial to approach its use with caution. The preparation of garlic for dogs involves selecting fresh, organic cloves, promptly peeling and preparing them to preserve their medicinal qualities, and introducing them slowly into your dog’s diet to allow for adjustment. However, the need for caution cannot be overstated. The risks associated with garlic, including possible toxicity, drug interactions, and breed-specific sensitivities, necessitate a careful, informed approach. Always consult with a veterinarian before introducing garlic or any new element to your dog’s regimen, especially if your dog is on medication or has pre-existing health conditions. By prioritizing your pet’s health and safety and adhering to expert guidance, you can make informed decisions about incorporating garlic or any supplement into your dog’s diet, ensuring they remain healthy and happy.

Brenda Thompson

Brenda Thompson is an expert in dog behavior with over a decade of experience, and she is also passionate about working with cats and birds. In addition to contributing pet content to, she is a Certified Dog Behavior Consultant. Brenda received her Bachelor of Science in Biological and Biomedical Sciences & Philosophy from Colorado College in 2014. She has taken classes in writing and remote animal behavior consulting, as well as courses on how to manage aggressive dogs and litter box issues. In 2016, she obtained her dog behavior consulting certification and joined the International Association of Animal Behavior Consultants.

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