The Pomeranian puppy uglies actually refers to the time between Pom puppy-hood and adulthood. The puppy uglies usually start at age 3 or 4 months, and will completely diminish by age 8 to 14 months. Throughout this development phase your puppy' coat will start to thin out and look a bit scruffy. Throughout this development phase your puppy' coat will start to thin out and look a bit scruffy. Pomeranian puppies have a thick, fluffy coat that they begin to shed around 3 months of age. The puppy will continue to lose hair until he is between 8 and 10 months old, when his adult coat has grown in.