I gave up on the mixed seed long ago. And it wasn’t a matter of them having something ‘better’ at the beginning then me switching seed on them. They never liked it. They always threw those pale round seeds out. LOL
So I gave up and got the straight sunflower seeds. I buy it in the 20 pound sacks so it’s cheaper; 40 pounds would be cheaper still but harder for me to handle.
Yes. That’s what I do. I buy bags at Tractor Supply. (one of my favorite stores)