I finally separated the seeds from the pellets, and at first, they didn't even epget close to them, but hunger makes the call; I did not give them ANY seed at all in the whole day until they went and took a second look, and sure enough, they ate them! Happy!
But now, as Carolyn told me, I'm the 'seed dispenser' so I'm getting much more attention from them. And I also bought budgie seed sticks, they're the closest to nutriberries here, but I doubt they will do the same job.
They consider it as a 'must have' now. And they're doing all they can to get them. I'm also giving them pure millet as treats.
Here's what they look like eating. Oh, and the reason I have two sticks is because Coco abuses poor and weak little Pip.