ABN stands for Advanced Beneficiary Notification. An ABN must be signed prior to providing a Medicare service or test to document that the patient is willing to assume responsibility for payment of services that Medicare may not cover when subject to either National or Local Coverage Determinations (NCD) or (LCD).
Chinchillas are crepuscular (most active around dawn and dusk) rodents, slightly larger and more robust than ground squirrels. They are native to the Andes mountains in South America and live in colonies called  herds  at high elevations up to 4,270 m (14,000 ft).
Chinchilla Dust Bath Information An innate characteristic for the chinchilla is to clean itself in a dust bath. In their natural surroundings, known to be dry or semi-arid, the chinchilla has no other way but to regularly bathe in fine volcanic ash. As an aspect of chinchilla care, dust baths are needed to maintain its rich coat, keeping it unsoiled, silky and in the best of shape.