Germs only have a chance if the immune system fails. No medication can help in the long term if the body's own immune system does not take over again. However, if the immune system and the intestinal flora are alert and active, germs hardly stand a chance.
So the most important ally for your dog's health is his own immune system. Most germs enter the body via the mucous membranes of the intestines and respiratory tract. Therefore, the top priority is to protect the mucous membranes and thus support the immune system! The colostrum of the cows, especially the first milking after birth, contains a high proportion of immunoglobulins, i.e. antibodies. They are the most effective protection for the mucous membranes and the strongest help for the immune system.