Frisco is a 4-year-old, 120 pound Great Dane. His owner came home to find Frisco barking and pacing around the house. He was so excited that he couldn't even stay still for a few seconds at a time. The dog's excitement is understandable considering his owner had just returned from an 8 hour trip to Oregon. After petting him for awhile, it became clear that there was something wrong with Frisco's nose--he started sneezing often and making strange noises when trying to breathe through his nose. The vet diagnosed him as having allergies after examining his nasal passages and performing blood work on him in order to rule out other potential causes of the symptoms (such as infection). Allergies are an incredibly common