Colloidal silver has been recommended for treating
several internal and external problems in pets.
Some doctors and pet owners have reported good
results when other treatments have failed.
Depending upon the manufacturer of colloidal
silver, which is NOT the same thing as silver sulfadiazine, the
actual quantity of silver in bottles is not always guaranteed.
Some doctors have reported bottles that had bacteria or fungus
growing in the bottles, which makes one wonder about the
potential antimicrobial action of some products.
Colloidal silver is produced by the electrocolloidal method,
which extracts microscopic particles from silver. These
microscopic particles pass out of the body in the urine and
feces. Because the colloidal silver maintains a positive electrical
charge, it should only be contained in dark glass bottles (plastic
maintains a negative charge and neutralizes the colloidal
Silver, in the form of silver sulfadiazine (Silvadene), is quite
useful for treating topical bacterial infections; especially
severe infections caused by gram-negative bacterial species
(pseudomonas spp. and aeromonas spp.). Both human and
veterinary medical doctors have reported success when the
product is used orally or topically in a variety of infectious
University studies show effective and quick antimicrobial kill of
staphylococcus epidermidis, staphylococcus aureus, enterococcus
faecalis, salmonella typhimurium, pseudomonas aeruginosa,
and candida albicans using colloidal silver (the product tested
was manufactured by SilverKare) when incubated at the
recommended 30 ppm.
One use of colloidal silver that anecdotally has shown some
success is the treatment of cats with either acute or chronic
sinus infections. A drop of colloidal silver is placed in each eye
and in the nostrils. It can also be added to the drinking water
or given orally.
While quality varies among manufacturers, properly produced
colloidal silver appears safe and effective in many conditions.
To date, no infectious organisms appear to have developed
resistance to colloidal silver.
While short-term use of some products has not resulted
in reported side effects, there is always the potential for
argyria (silver poisoning) in improperly made products and
those containing silver salts. According to several scientific
publications, the human consumption of silver may result
in argyria, a permanent ashen-gray or blue discoloration of
the skin, conjunctiva, and internal organs. However, this has
not been seen in people or pets using properly manufactured
While more reports and controlled studies are needed,
preliminary reports appear encouraging. Because of the
potential benefits of colloidal silver, owners should discuss
this therapy with their veterinarians; discuss the latest studies
available, and possible use in the treatment of infectious