Transient Juvenile Hypoglycemia, which is brought on by fasting, is common in Toy breed's, such as Yorkshire Terrier, Toy Poodle, Chinese Crested, Pomeranian and other Toy dog breeds, and usually seen in puppies 5 to 16 weeks of age. Stress, low body temperature, poor nutrition, sudden change in feed, water and schedule patterns, infections, and premature birth may precipitate the onset of hypoglycemia.
Most common clinical signs of hypoglycemia are drowsiness, shivering, collapsing, disorientation, seizures, listlessness, depression, muscle weakness and tremors. Lee Weston, author of the article about Hypoglycemia (Pomeranian Club of Canada) says that "the entire sequence of clinical signs is not always seen, so close observation of your pet and knowing when your dog is going into a distressed state can mean the difference between life and death of your dog. Immediate treatment by you and or a veterinarian is imperative, as recurrence of, or prolonged attacks, can cause permanent damage to the brain."