The phrase "Pomeranian puppy uglies" refers to a stage of puppy development that happens in between the shedding of the puppy coat and growing in the full adult coat. During this period, some consider the puppy to look scraggly and unkempt.
In a healthy Pomeranian puppy, the puppy coat begins to shed out at around 4 to 8 months of age. The full adult coat finishes growing in between 10 to 14 months of age. Pomeranian puppy fur has a single layer and is very soft and smooth. The adult coat has a short, thick undercoat and a long, smooth outer coat.