Even if we can all agree that it is a pleasure to own a dog, the problem is that almost 20 percent of all people are allergic to various animals. This basically results in owners that are faced with a very unpleasant situation since they cannot live with the dogs that they love.
Substances that will cause allergic reactions are known as allergens. Inhaling or touching them is going to lead to the reaction that you do not like. Common symptoms include itcy, red and watery nose, coughing, sore throat, itchy skin, difficulty in breathing, sneezing and many others.