Taking a break as RIc says may have helped here. I was getting really trashed by them in January, feeding 'patio mix.
I do not buy cheap suet cakes with seed in them. My theory is that they break up and fall apart quickly, not giving you a great value. (My two cents) Pure suet does not seem to draw blackbirds here, and lasts weeks feeding good birds.
Feeding strictly safflower and millet does not seem to draw blackbirds.
Corn and bread seem to get blackbirds here.
My theories/observations....
