When you're the fifth person to quit at a company in just a month, you know it's a sinking ship. Companies with high turnover rates should make any prospective job-seeker run for the hills. When your business can only retain employees for a few months, it might appear at first that the individual isn't cut out for the job. But when lots and lots of people rush out the door after just a few months, it's definitely more of a problem with the company itself. Of course, you can't really tell how hi…