With your pellets being that high proteins, I would switch them whenever they can seem to manage the pellets. I was worried about switching them off starter too soon because in the first 8 weeks they grow tremendously AND grow in all their feathers - both high protein needs. Most layer and or all flock blends aren't that high a proteins.
As @rural mouse suggested, since you have almost a week's worth left (I thought that is what you said) start mixing some of your all flock in right away and see how they manage. They will either eat around the pellets, or start eating them, too.
