There are many different kinds of bird seed in the world today. But half of the bird seed manufactured doesn't bring birds to your feeders. Birds don't like to eat every kind of seed there is out there. So here are the ones I recommend. Black oil Sunflower seed is the only kind of seed I buy. The birds love it and so do the squirrels. I have been using Black Oil Sunflower seed for six years and have never had a problem with it. Also I recommend buying suet. I do not know as much about suet as I do about bird seed but I think just about every suet brand is accepted by the birds.