Investors who want to add defensive stocks to their holdings should consider companies that sell everyday essentials and have already proven to be relatively strong performers over the last year. McDonald's (NYSE: MCD) and Procter & Gamble (NYSE: PG) both outperformed the S&P 500 index over the last 15 months. Both pay above-average dividend yields and have wide competitive moats that should lead to many more years of dividend increases.