Abu Hanifah/iStock via Getty ImagesOn our last update on National Health Investors, Inc. (NYSE:NHI) we saw some green shoots that were working well for the REIT. We even preferred NHI over some other REITs in the sector. NHI has navigated the COVID-19 problems quite well. If you look at total FFO lost from pre-COVID-19 levels, you can see that NHI lost about 20% of its pre-COVID-19 FFO. Ventas (VTR) by comparison has lost about 24%. Sabra Health Care (SBRA) has lost closer to 30%. What's most impressive ...