You probably are usually amused when you see your dog chase it’s tail. There really is little harm if your dog tries to chase his tail every once in awhile but sometimes the tail chase could mean problems.  If your dog goes after his tail frequently, it could become an obsession and there may even be an underlying behavioral or medical problem.  If your dog chases his tail frequently, try to distract him with a dog toy or a command to “sit.”  Reward him if he shifts his attention. If the problem continues, consult your veterinarian.  He will help you determine whether or not your dog’s tail chasing should be a cause for concern.