When a Pom is a very young puppy, the dewclaws are only very small and soft nails. There is no extra digit yet. Veterinarians that remove the dewclaws at this young age typically do so without anesthesia. It is often compared to carefully sliding out a splinter.
When an older pup or an adult Pomeranian has their dewclaws removed, they are not soft, pliable nails any longer. What can be described as an extra ‘toe’ grows in the area of the dewclaw that is made of flesh, muscles, ligaments, blood vessels, and nerves, just like any other body part.
Removal at this stage is considered an amputation which requires anesthesia. Since toy breeds can be sensitive to anesthesia and its use should be limited, if a Pom is not yet spayed or neutered, veterinarians will often recommend doing both the spay/neuter procedure and the dewclaw removal at the same time.
During the procedure, both the toe and claw are removed. Stitches are put into place and healing time can vary from 2 to 4 weeks. During that time, care must be taken to keep the area clean. Many Poms will have urges to lick the area and this can interfere with recovery time, so a covering and/or Elizabethan collar is usually used.
If you are thinking about having your Pomeranian's dewclaws taken out, do discuss the entire procedure with your Pom's vet, including the element of anesthesia. Toy breeds can have issues with sedation; such things as the constant monitoring of blood pressure and the use of heat wraps can help cut down on the risks. The benefits of surgery should outweigh the discomfort a dog is having with their dewclaws.