This is the most common cause of serious allergies in dogs. Generally, there are certain bacteria that thrive in the dog’s skin. This is known as the species of Staphylococcus bacteria. In most cases, this does not cause allergies in dogs. However, there are certain types of dogs that develop an allergy to it.
The most common symptom of this kind of allergy is hair loss along with the development of ringworm like marks in the dog’s skin. The areas where these marks appear usually get infected, hence, it is important to treat them with antibiotics.