I was putting just sunflower seeds in one of the feeders for a couple weeks now. The feeder would see, Chickadees, Purple Finches (male and female), American Goldfinches and a few other undetermined birds. Once we saw a bluejay on the feeder but they seem to like the ground better.
On a recent refill I placed this Red Ribbon brand product into the feeder. All the birds refused to eat it. After a couple days I dumped it out and placed it on the ground, which then attracted Bluejays along with an aggressive squirrel who kept chasing off the Bluejay. We also saw a female Mourning Dove that seems to have taken a liking to the feed.