Veterinarian Dr. Andrew Koenitzer of Craig Road Animal Hospital in Las Vegas, Nevada, discusses causes, symptoms, and treatment of allergies in cats and dogs.  Allergies, or an allergic reaction, is the body’s immune system over reacting to something it comes into contact with. Allergies are incurable. To treat allergies, it is only possible to manage the symptoms of an allergic reaction. Types of allergies in dogs and cats include food, environmental, flea contact, and allergic reactions to drugs.  Due to…