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• Nasal Polyps in Cats

  Polyps are benign fleshy growths that originate from the cells lining a cat's nasal passages, leading to a variety of clinical signs such as sneezing, difficulty breathing, and recurrent ear infections. The various diagnostic tools and treatment approaches are explained in this handout.

• Nasal Tumors

  Nasal tumors are an uncommon type of cancer but when they do occur, they tend to be malignant and locally aggressive. Staging can be done to determine the type of cancer and if it has affected anywhere else in the body. Treatment can be done in some cases to help relieve clinical signs, most often with radiation therapy.

• Nasopharyngeal Polyps in Cats

  Nasopharyngeal polyps are benign idiopathic masses originating from the middle ear that extend either down the eustachian tube or into the external ear. They can cause stertor, nasal discharge, otitis, otic discharge and head tilt. Diagnosis may involve visualization through otoscopic exam or behind the soft palate, but usually needs radiographic evidence or more advanced imaging such as CT or MRI. Treatment involves debulking the mass through traction which has a high rate of recurrence, or more advanced surgery into the bulla to remove the source of the polyp.

• Navicular Syndrome in Horses

  Navicular 'disease' is really a group of related conditions affecting the navicular bone and associated structures in the foot. There are several possible causes of pain in and around the navicular bone.

• Neapolitan Mastiff

  True to his heritage and looks, the Neapolitan Mastiff can be a tough character. He's suspicious of strangers, aloof with acquaintances, but fiercely loyal to family. He's generally laid-back at home, and he doesn't bark a lot. Of course, when he does, you'll hear it.

• Neuroendocrine Tumors

  Neuroendocrine tumors are a group of tumors that develop from the cells of the neuroendocrine system, and include insulinomas, gastrinomas, glucagonomas, carcinoids, medullary thyroid carcinomas, small-cell lung carcinomas, pheochromocytomas, chemodectomas, and Merkel cell carcinomas. Some of these tumors are functional, while others are non-functional. The signs of disease in dogs and cats depend on the type of growth, location of the tumor, its size, the degree of infiltration in the surrounding tissues, whether it has metastasized, and whether it is functional. A definitive diagnosis requires tissue biopsy and histopathology, often with histochemical staining and electron microscopy. Staging is highly recommended for these tumors. Treatment may involve surgery, chemotherapy, radiation therapy, and medical and dietary management.

• Newfoundland

  Newfoundlands are easygoing, face-washing people lovers and a great choice for the first-time dog owner who is not afraid of a little drool, a big dog, and a lot of hair.

• Norfolk Terrier

  I will fight him with both paws tied behind my back, I will! Yep, that is a Norfolk all right. Sometimes called a demon in the field, the Norfolk is a terrier through and through, with a feisty, scrappy spirit and plenty of energy for the next great adventure. She may be tiny, but buckle your seatbelts - you are in for a terrier of a good time.

• Norwegian Buhund

  Cheerful and highly active, Norwegian Buhunds form strong bonds with their families, and they love to snuggle and give kisses. They need plenty of exercise and stimulation, and love to play.

• Norwegian Elkhound

  The Norwegian Elkhound may look threatening, but he can be a sweetie-pie to his people. Threaten those people, however, and this medium-sized, ancient Nordic breed is fully capable of acting as intimidating as he looks.