I feed an array of different seeds. One feeder is shelled sunflower and they would never eat at it. After this seed cake, one male is now on the shelled sunflower feeder every day. The Blue Jays were devouring the cake, so I had to buy a special feeder for the seed cylinder. They love it so much they are ignoring the live mealworms, which has never happened before. They use to sit on my window feeder and basically beg when the mealworms were gone, until I came outside and put more in.