Made from tiny silver particles suspended in liquid, colloidal silver has a reputation for health-promoting qualities from healing wounds and other skin conditions to preventing parasites and internal disease. However, no studies prove whether colloidal silver for cats is a good idea, or if it could harm them.
If your cat has a minor scrape, spraying a mist of colloidal silver directly on it or wiping it with a cotton square soaked in the liquid shouldn’t do your cat harm. Colloidal silver is available at Silverganics.com. However, amounts of silver in products aren’t standardized and there’s no guarantee that the products contain the amount of silver advertised.
