Patellar luxation is quite common in toy breeds, and the Pomeranian is no exception. This is a disorder of the kneecap in which the knee will slip out of place when the dog moves. There are varying degrees of this disorder, with the most severe requiring surgery.
Tracheal collapse is a disorder of the windpipe. When weakened, it will collapse resulting in persistent coughing and difficult breathing. Your veterinarian can recommend medication for this problem.
In whelping puppies, c-sections are commonly required with Pomeranians. Since the breed has been bred down from larger dogs, it has difficulty in free whelping.
Open fontanels are an opening in the top of the skull, much like what we see in a new born infants, and are not uncommon in the breed. Fortunately, most of the smaller ones seen in puppies will close when they are adults.
Entropion is an eye problem where the eyelid rolls inward. The lashes on the edge of the eyelid irritate the surface of the eyeball. Entropian can lead to more serious problems, including blindness. Surgery can correct this most of the time.
Cryptorchidism is a condition in male dogs where one or both testicles do not descend into the scrotum. Sometimes puppies will have both testicles descend by the time they are 6 months old.
Overshot/undershot bites are where the teeth do not line up properly in a scissor bite. This is caused by either the upper or bottom jaw growing longer than the other. This is not the same as teeth being out of line, which can occur when retained puppy teeth are not removed. Click here to read my article on removing retained puppy teeth.
Low thyroid is common in the Pomeranian. Have your veterinarian check for it with a blood test.
Black Skin Disease is a known problem in the Pomeranian and can affect both sexes, but more often shows up in the male. Puppies with cotton or sheeps wool textured coats are more prone to this condition than puppies with normal coats that have the long guard hairs. Currently there is still a lot of research being done on this disease and how to treat it.
Hypoglycemia is very common in the small toy breeds. Click here to read my article on how to deal with hypoglycemia.