Denis Shevchuk/iStock via Getty Images Introduction It's been a while since I last looked at Enbridge (NYSE:ENB) (TSX:ENB:CA), and while I definitely respect investors focusing on dividend growth when they look at Enbridge, I'm focusing on the company's preferred shares. It adds an additional layer of safety to the fixed income portion of my portfolio. And while I fully acknowledge I'm giving up potential capital gains, I don't mind having a "lower risk" preferred stock in my portfolio. I, of course, realiz ...