luxating patellas, hip dysplasia, mitral valve disease, portosystemic shunts, atopy(allergic inhalant dermatitis) and incorrect bites (how the teeth meet when the jaws are closed). Like all dogs, Norwich Terriers can have autoimmune reactivity to rabies vaccinations. Rabies-Vaccine-Induced Ischemic Dermatopathy, or RVI-ID, is a non-fatal but potentially serious reaction to chemicals called adjuvants in the vaccine. RVI-ID is often misdiagnosed, but if correctly diagnosed, is treatable. Symptoms may include: symmetrical dark spots or lesions at the tips of the ears; swelling, hard lumps or dark spots in the vicinity of the injection site. Higher volume Norwich breeders are seeing more dogs with breathing concerns, and the Norwich and Norfolk Terrier Club (USA) has formed a new "Health and Genetics Sub-Committee for Research on Upper Airway Syndrome in Norwich Terriers". Upper Airway Syndrome (UAS) covers all abnormalities that can occur in the upper airway, including: elongated soft palates; too short soft palates; narrow/misshapen tracheas; collapsing tracheas; stenotic nares (nasal passages that are too small); swollen tonsils; everted laryngeal saccules. These upper airway disorders can occur singly or in combination with one or two others. All compromise the airway and the dog's ability to breathe normally; the dog's breathing often sounds raspy or moist. It may be that shorter muzzles may have increased incidence of such issues. Norwich Terriers generally have small litters of 1 to 3 puppies. Generally, if a female is healthy, its optimal breeding period is between the ages of 2 (after all genetic health testing is complete - heart, eyes, hips and patellas) and six years. At seven years of age dogs are considered geriatric. The small supply and the high price of a purebred Norwich Terrier - often around US$4,500 in 2020 - has attracted fraud, as unsuspecting buyers pay full price for Cairn Terriers with docked tails, or mixed-breed puppies. In Canada and the United States, the Orthopedic Foundation for Animals maintains an open registry of dogs that have completed their genetic health testing program. Care Exercise requirements Norwich Terriers are hardy, active dogs, bred for a working life of pursuing vermin and accompanying their farmer owners on horseback. A good daily walk is therefore the minimum needed to meet the exercise requirements of a healthy Norwich Terrier. Norwich Terriers compete in Earthdog competitions, and are increasingly common in Agility and Flyball competitions. The dogs were bred as working terriers, and thrive best with at least one