Hypoglycemia: (low blood sugar) is common in Cavalier King Charles Spaniel puppies and they usually outgrow the condition by 6 months of age unless there is a problem causing the condition. Cavalier King Charles Spaniel puppies should be fed 3 to 4 times per day and especially Cavalier King Charles Spaniel puppies with this condition. If a Cavalier King Charles Spaniel puppy is traveling and needs to be without food for an extended period of time then the Cavalier King Charles Spaniel puppy needs to be supplemented with Nutrical or Nutristat to maintain blood sugar levels during travel. Symptoms include but are not limited to: Slow heartbeat and breathing, weak, sleepy, disoriented, wobbly, glassy eyed, and seizures.