I mixed feeds 50/50 when I switched from a Starter Grower to a Layer feed with my first Flock and would do the same in reverse for a week to 10 days or until you run out of Layer feed. GC
I give my pullets and hens Scratch daily.
A half Tbsp per chicken twice daily scattered in their pen, a Tbsp per chicken twice daily during winter season.
A coffee scoop makes measuring easy for 8 chickens.
I feed a Non-Medicated Starter-Grower 18% Protein year round with Oyster Shells...