What feed next?

[Bushastead]

Good morning!
I believe my silkies are about 3.5 months old. They have finished off the last bag of chicken starter food i bought them and I am wondering if I should keep them on that or move onto something else.
Please let me know! Thank you!
I posted pictures of my littles!

 

[FortCluck]

I feed my chickens flock raiser by Purina (crumble) or all flock by Nutrena (pellets) (I blend them with a blender) from the start because I have differing ages in my flock and roosters. Those two feeds give the best nutrition to my flock and I supplement eggshells on the side for calcium.