14 Jul, 2025

The best natural antibiotics for dogs

I
Irina Turcan
The best natural antibiotics for dogs

In this article, we’re talking about when and why to consider a natural antibiotic for dogs. We also introduce some of the most effective options and how to use them.

What is a natural antibiotic for dogs?

Antibiotics are medicines that help to fight off bacterial infections in dogs, humans, and other animals. They work by killing the bacteria and/or preventing them from spreading and multiplying within the body. Some antibiotics are broad spectrum, meaning they’re effective against many types of bacteria. Others, known as narrow spectrum, only target specific kinds. Neither variety is a cure-all – for example, antibiotics are not useful for treating viral or fungal infections.

Antibiotics are prescription medications, so you should only give them to your pet under the direction of a vet. You don’t need to treat every bacterial infection with antibiotics, because some will clear up on their own. To ensure they’re effective, follow all the instructions carefully and always complete your pooch’s entire course of antibiotics.

Conversely, a natural antibiotic for dogs is a herb, spice, or similar type of plant or food that has innate antibacterial properties. Practitioners of traditional medicine systems have been using them to support human wellbeing for generations. And modern scientific research is finding evidence to confirm their potential for fighting bacterial infections – both in people and pups. But what’s the point in looking for a natural antibiotic for dogs if we already have prescription ones?

Why consider natural antibiotics for dogs

Antibiotics are powerful and lifesaving medicines that have made it much easier for doctors and vets to treat bacterial infections. However, that doesn't mean there are no downsides to using them, or that natural antibiotics for dogs are redundant.

Probably the most well-known problem is antibiotic resistance.(1) This is when bacteria adapt and build up a resistance to antibiotics, making the medication less effective against them. Some even become ‘superbugs’, which can be extremely difficult to treat. Essentially, giving your dog antibiotics unnecessarily or not completing the treatment may mean those drugs won’t work as well for them (and other animals) in the future. This is why it’s vital not to overuse antibiotics and to always complete the full course of treatment.

Another reason pet parents might want to find a natural antibiotic for dogs is to avoid side effects. Some pups have allergic reactions to specific antibiotic medicines, while others experience gastrointestinal upset when taking them.

Speaking of gastrointestinal upset, antibiotics may also cause an imbalance in your pup’s gut microbiome.(2) This is because the medication doesn’t always distinguish between ‘good’ and ‘bad’ bacteria and can kill off both. Conversely, a natural antibiotic for dogs is gentler, so shouldn't disrupt the microbiota. Your pooch’s gut microbiome influences everything from their immune system to their mental health, so this is an important consideration.(3)

Should you give your dog natural antibiotics instead of regular antibiotics?

Let’s be clear: you shouldn’t use a natural antibiotic for dogs as an alternative to prescribed medication. If your pooch’s vet recommends you give your pet antibiotics, you should follow their advice.

So when can you give your dog natural antibiotics? They’re more effective as a pre-emptive measure to prevent bacterial infections or as a treatment for mild cases. You might also be able to use them as a complementary therapy alongside regular antibiotics. However, check with the vet first to help your pup avoid any unwanted interactions or side effects.

What can I give my dog as an antibiotic at home?

Each of the following ingredients counts as a natural antibiotic for dogs thanks to its innate antimicrobial properties. Interestingly, many show promise in tackling even antibiotic-resistant bacteria. The most appropriate one for your pet will depend on factors like their health condition and the reason you’re using them.

Manuka honey

Arguably the most famous natural antibiotic for dogs, manuka honey possesses impressive antibacterial, anti-inflammatory, and antioxidant properties. Studies show that when applied topically, the ingredient can accelerate and support wound healing in animals by inhibiting bacterial growth.(4) It may also be useful for oral health conditions caused by bacteria, like gingivitis and bad breath.

Some people suggest giving manuka honey to pups with sore throats and coughs too, because its thick consistency eases irritation. Furthermore, research has found that the ingredient could help to treat canine otitis externa – a type of ear infection – by killing off the bacteria causing it.(5) One important caveat to note is that manuka honey might not be an appropriate natural antibiotic for dogs with diabetes. This is because of its high sugar content.

Thyme and oregano oils

We’re talking about these two natural dog antibiotics together because they share the same antimicrobial phenolic compounds: carvacrol and thymol. Studies show that both thyme oil and oregano oil are effective against bacteria like E. coli in dogs.(6) Research has also found that the oils can help fight several strains of bacteria responsible for canine urinary tract infections.(7) In addition, like manuka honey, thyme and oregano could be useful in treating pups who have otitis externa.(8)

When using oregano or thyme essential oil as a natural antibiotic for dogs, you must dilute it in a carrier oil. This applies whether you’re applying the ingredient topically or feeding it to your pet. For example, you could add a drop of essential oil to a tablespoon or two of olive oil. The specifics will depend on the size of your pup, so check with a vet if you’re unsure. Always use a high-quality oil that’s marked as food grade and safe to ingest.

Turmeric

Although perhaps best known for its anti-inflammatory properties, this golden spice acts as a natural antibiotic for dogs too.(9) This is thanks to its main active compound, curcumin, which disrupts bacterial membranes and inhibits bacterial growth and cell division. As such, the ingredient could be effective against a number of bacteria strains that cause infections in our pups.

You can add a little turmeric powder to your dog’s normal wet food, along with a bit of black pepper. This helps to increase the bioavailability of curcumin. It’s best to start with small quantities to avoid causing your pet any digestive upset.

Cranberry

You’ve probably heard that cranberries help to prevent urinary tract infections (UTIs) in humans. What’s interesting is that the ingredient might do the same for our furry friends. Research shows that the fruit could stop bacteria from adhering to the walls of the canine urinary tract and bladder.(10) This reduces the risk of infection by making it harder for colonies of bacteria to form. Such results may be thanks to compounds called proanthocyanidins, which have antibacterial properties.

We should note that this natural antibiotic for dogs is more effective at preventing UTIs than curing them. If your pooch already has an infection, they’ll likely need medical antibiotics. To add cranberries to their diet, simply wash fresh berries, cut them into small pieces, and serve them plain.

Goldenseal

Goldenseal is a herb whose antimicrobial properties are primarily due to a compound called berberine.(11) Research suggests the plant is effective against many strains of bacteria, and could prevent them from attaching to cell walls. This includes those responsible for infections in the upper respiratory tract, urinary tract, digestive system, and mouth. However, further study is necessary to clarify how useful goldenseal is as a natural antibiotic for dogs.

How to give your dog natural antibiotics safely

If you’re thinking of giving your pet a natural antibiotic for dogs, there are a few safety pointers to bear in mind. We’ve mentioned some that are specific to individual ingredients above, but here are a few more general guidelines.

First, always stick to the recommended dosage and follow the instructions on your chosen product. These may vary depending on factors like how big your pooch is and what you’re using the ingredient for. As such, it’s crucial to read all the information carefully. We advise against making your own homemade antibiotics for dogs, because it’s tricky to guarantee they’ll be safe or effective.

We also recommend that you always consult a vet before using a natural antibiotic for dogs. Just because an ingredient is natural doesn’t mean it’s suitable for all mutts. This step is especially important if your pet has an existing health condition or is on any medication. Some plants can be very potent and may interact with veterinary drugs. Further, never give functional foods like these to puppies or animals who are pregnant or lactating.

Whichever natural antibiotic for dogs you choose, start with a low dose and monitor your pet for side effects. If you spot any, stop using the ingredient and take your furry friend to the vet.

Supporting your dog while they’re on antibiotics

If your beloved pooch needs to take medical antibiotics, there are several things you can do to support them. Most obviously, follow your vet’s instructions regarding dosage and timing exactly. You must also complete the full course of antibiotics – even if your mutt seems to be feeling better before then. You might be able to give your pup a natural antibiotic for dogs as well, but ask the vet first.

There are some steps you can take to mitigate the potential negative effects of antibiotics on your pet’s gut microbiome. For instance, try adding probiotics like yoghurt or kefir to their diet. These help to top up the good bacteria in their digestive system. You could also offer them prebiotics to nourish those good bacteria. Our Jerusalem artichoke powder is rich in a type of fibre called inulin that does exactly that. Alternatively, our turkey tail mushroom powder contains oodles of gut-friendly beta-glucan fibre.

If your pup experiences some tummy troubles because of the antibiotics, feeding them a bland diet may help. Unseasoned boiled chicken with plain white rice is a popular choice for many pet parents. Making sure your pooch always has access to fresh, clean water helps them stay hydrated, especially if they have diarrhoea. Finally, prepare a calm and comfy space for your canine companion to rest and recover in.

Beyond natural dog antibiotics: supporting your pup’s overall health

There are lots of other ways to care for your pet’s wellbeing and immune system besides giving them a natural antibiotic for dogs. For example, you could add functional foods to their diet that support immunity via different mechanisms. That could be echinacea for easing upper respiratory tract infections, or ashwagandha powder to alleviate stress and anxiety.(12) Or you could drizzle a little antioxidant-rich chia seed oil over their meals for a healthy dose of omega fatty acids. Either way, choose a high-quality dog food that offers your mutt all the nutrients they require.

Moving away from grub, making sure your pup gets plenty of exercise is key too. Obesity weakens your pet’s immune system, slowing wound healing and leaving them more vulnerable to infection and disease.(13) It’s also a good idea to take your pooch for regular checkups at the vet and ensure their vaccinations are up to date.

Finally, you’ll lessen the chances of needing a natural antibiotic for dogs by keeping their bowls, toys, and bedding clean. This helps prevent the growth of bacteria that could compromise their immune system or cause an infection. Bathing your pooch frequently is also useful – even if they’re not keen on it!

What’s the strongest natural antibiotic for dogs?

There’s no simple answer to this question. That’s partly due to insufficient research, and partly because the best natural antibiotic for dogs depends on their specific needs. Having said that, manuka honey, thyme and oregano oils, and turmeric are among the top contenders. Just remember to check their suitability for your pet beforehand. And you should never use them in place of medical antibiotics prescribed by your vet. Instead, think of them as treatment options for mild conditions that don’t require such antibiotics. You can also harness them as preventative measures to help stop infections developing in the first place. Anything that means fewer trips to the vet is sure to keep your mutt happy!

References
  1. The use of antibiotics and antimicrobial resistance in veterinary medicine, a complex phenomenon: a narrative review Antibiotics, 2023.
  2. The role of the canine gut microbiome and metabolome in health and gastrointestinal disease Frontiers in Veterinary Science, 2020.
  3. The gut-brain axis Purina Institute.
  4. Why use manuka honey The Veterinary Nurse, 2018.
  5. Efficacy of medical grade honey in the management of canine otitis externa – a pilot study Veterinary Dermatology, 2016.
  6. Use of essential oils in veterinary medicine to combat bacterial and fungal infections Veterinary Sciences, 2020.
  7. Antimicrobial activity of five essential oils against bacteria and fungi responsible for urinary tract infections Molecules, 2018.
  8. Antimicrobial activity of thyme oil, oregano oil, thymol and carvacrol against sensitive and resistant microbial isolates from dogs with otitis externa Veterinary Dermatology, 2019.
  9. Turmeric and curcumin – health-promoting properties in humans versus dogs International Journal of Molecular Sciences, 2023.
  10. Effect of cranberry extract on prevention of urinary tract infection in dogs and on adhesion of Escherichia coli to Madin-Darby canine kidney cells American Journal of Veterinary Research, 2016.
  11. Goldenseal (Hydrastis canadensis L.) and its active constituents: a critical review of their efficacy and toxicological issues Pharmacological Research, 2020.
  12. Efficacy and safety of standardized ashwagandha (Withania somnifera) root extract on reducing stress and anxiety in domestic dogs: a randomized controlled trial Journal of Veterinary Behavior, 2022.
  13. The growing problem of obesity in dogs and cats The Journal of Nutrition, 2006.

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