Colloidal silver and pets

Given the positive results of colloidal silver seen on humans, more and more pet owners use colloidal silver to help their dog, cat, fish or horse fight infections.


In fact, it has been demonstrated that colloidal silver is effective against over 650 pathogens, that it destroys microbes in less than 6 minutes and that it is non-toxic*1. Silver has been used for thousands of years for its antiseptic properties (antibacterial, antiviral and antifungal).


The medical journalist Steve Barwick systematically uses colloidal silver when one of his four dogs or his cat show early signs of illness. When he fills two bowls with water and adds colloidal silver to one of them, his pets choose the bowl containing silver every time*2. Several other internet users have made the same observation.

The animals quickly show signs of recovery. One of Barwick’s Labradors, abandoned by his previous owner in the desert, was in a bad way: he suffered from several tumours and arthritis. Once Barwick administered colloidal silver on a regular basis, symptoms decreased significantly so that the dog was able to run and go on long nature walks without showing signs of breathlessness or pain

To date not enough scientific data has been published demonstrating the effectiveness of colloidal silver in treating animals. It has many positive effects on humans (colloidal silver was a basic product of the pharmacopeia at the beginning of the 20th century, it was used to treat syphilis and gonorrhea among others) so it is fair to suggest that colloidal silver also has an antiseptic effect on animals. This is what many pet owners are finding according to the internet.

1. Patent highlighting the curative effects of colloidal silver on aquarium fish species















The report describes the treatment of a wide range of skin lesions on tropical and aquarium fish species by administering colloidal silver in the aquarium.

Over the course of the treatment the colloidal silver is added periodically to the aquarium so that the water’s concentration of silver stays around 1 ppb (parts per billion). It is recommended to add one teaspoon of colloidal silver, containing around 6 ppm of silver, to 40 litres of water once every other day.

It has been noted that skin problems linked to viruses and bacteria can be avoided through preventative diffusion of colloidal silver at a concentration between 0.3 and 0.5 ppm*3.


2.  Use of colloidal silver on dogs, recommendations of “Dogs Naturally Magazine”















Some dog owners use colloidal silver to treat intestinal problems, cuts, burns or any kind of bacterial, viral or fungal infection.

There are many different ways of using colloidal silver to boost the immune system. Here are the five different ways recommended by the magazine*4:



Colloidal silver can be used against bacterial, fungal or viral infections (even to help treat parvovirus). In addition, it can be used preventively, if dogs are exposed to sick people or animals.



Colloidal silver can also be used topically against skin infections like ringworm, wounds and burns. It aids tissue regeneration, providing an almost immediate feeling of relief.



For dogs suffering from ear infections colloidal silver can provide some relief. The liquid can be administered directly into the ears to help fight bacteria and yeast.



Colloidal silver can also help resolve eye problems caused by infections, allergies, inflammation or tear stains. As it doesn’t sting, it can be put directly into the eyes.



Colloidal silver is surely one of the most versatile natural immune system boosters. It can not only be used in very sensitive areas such as the eyes, but it can also be inhaled to treat respiratory problems such as asthma, bronchitis or pneumonia, according to the website Wolf Creek Ranch.

An interesting video by Steve Barwick suggesting administration methods of colloidal silver:


3. Colloidal silver on cats and advice of veterinary surgeon Dr. Shawn Messonnier


According to the veterinary surgeon Shawn Messonnier liquid colloidal silver can help cats in many cases. Here are 7 pieces of advice from Dr. Messonnier*5:

1. Colloidal silver is available in various concentrations ranging from 3 ppm (parts per million) to 500 ppm. The concentration appropriate for internal use in cats is between 30 and 50 ppm, while higher concentrations are fine for most external application, according to Sandy Arora, author of "Whole Health for Happy Cats."

2. Treat your cat's dental problems, such as gingivitis, by applying colloidal silver directly to the teeth and gums with a gauze pad or cotton wool. This may require plenty of patience (and leather gloves) depending on your cat's level of cooperation. One application is generally enough to get the silver to mix with your cat's saliva and distribute itself throughout the mouth.

3. Administering colloidal silver to your cat orally to treat feline urinary disorders, including Feline Lower Urinary Tract Disease (FLUTD) or Feline Urological Syndrome (FUS). Arora recommends a dosage of one drop two to three times per day for seven days, then one drop per day for two to three more days.

4. Dr. Messonnier recommends adding colloidal silver to your cat's wet food or drinking water if oral administration proves too difficult.

5. Spray undiluted colloidal silver at 50 to 100 ppm directly onto skin irritation and wounds two to three times per day for three to five days, or until the condition visibly improves.

6. Soothe eye irritation by wiping your cat's eyes with a soft cloth or cotton wool moistened with undiluted liquid colloidal silver.

7. Feel confident about administering colloidal silver to your cat in conjunction with other medications since there are no known side effects or drug interactions.



4. How to dose? And how to administer colloidal silver to your pet?


Your pet is very important to you and you want to give it the best care possible. So you are right to think about the dosage and how to administer colloidal silver.

Depending on the docility of your animal during the administration of colloidal silver, these are the different strategies to follow:

A. External use:

Apply directly to the required area via spray or a cotton pad moistened with colloidal silver (3 times per day for 7 days)

B. Internal use:

  • Via a feeding syringe for your pet

  • Add colloidal silver to drinking water

  • Mix colloidal silver with wet food


In these three cases, 3 times per day for 7 days. Stop earlier, if the infection ends in less than one week.


What dosage for internal use?


According to the EPA humans are able to ingest up to 5 micrograms of silver per kg of body weight per day for life without side effects*6. Using the same reasoning for animals, this equates to 50 micrograms of silver per day for life for a 10 kg dog.

For a concentrated solution of 40 ppm, this is the equivalent of 2 millilitres per day for life (a little less than half a teaspoon).


In order to simplify calculations, you could say that 1 millilitre of colloidal silver corresponds to 5 kilograms. If your dog weighs 20 kilograms, you can administer 4 millilitres per day. 

If you do not see results with these low doses, you can increase the dose significantly, because the recommendations are based on a lifelong daily dose. 

 This advice is not a substitute for a visit to the vets.



1) Article, highlighting the impressive effects of colloidal silver: “Our Mightiest Germ Fighter” by Jim Powell, Science Digest, 1971:


2) Article by journalist Steve Barwick, recommending the use of colloidal silver on pets:


3) Patent (USA) on the positive effects of using colloidal silver on aquarium fish species:


4) Recommendations from "Pets Naturally" magazine on colloidal silver and dogs:


5) Recommendations of Dr. Shawn Massonnier on using colloidal silver on cats:


6) EPA Report (CASRN 7440-22-4):


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