RollerFeeder is a “seed friendly” solution with no compromises! If you want to attract the best songbirds such as chickadees, finches, and nuthatches use the best bird seed, Black Oil Sunflower (or mix with sunflower hearts). There is no need to consider any other bird seed other than the best for a R-Feeder and your favorite songbirds. Quality feeder birds most favorite seed is Black Oil Sunflower or the highest grade mixed seed which includes 90 – 95% black oil sunflower. It is also the best seed for birds because it has the highest fat content during winter months. Larger birds like starling, blackbirds, grackles, and blue jays cannot get to the best seed with a R-Feeder, neither can squirrels or other rodent animals. Use the best, 100% black oil sunflower, or 95% black oil sunflower mixed with the highest quality mixed seed or sunflower hearts.