SCAT
If you see a pup alone, you may not be able to see the whole picture. Wolves are neophobic, afraid of new things. Older pack members watching the pups may be off to the side, watching just out of view. The pups might be waiting for the pack to come back with food. Another possibility is the pups are exploring around the den, and although they appear to be alone, they are not. Either way, you may see the pups, but do not be concerned, they are likely perfectly fine and exploring their territory