RawPaw Colloidal Silver is available separately, or as a colloidal silver and gold mix. Colloidal silver is a popular anti-oxidant for pets, as it is all natural. It can be used to fight bacterial, viral, and even fungal infections in a safe and natural manner. It is also believe to boost your dog’s immune system, as well as their overall health and well-being. It can be used topically or orally. Colloidal gold is most commonly used to accelerate healing of broken bones, torn muscles, and age related injuries.