They are getting a great diet! They just don't need the corn scratch. Stop the corn and keep on truckin! Honestly they don't need the corn. It will cause fat to build up around their internal organs and cause stress to the functionality of their body.
I have to question why they need the scratch? It is like candy. At 3 weeks they should be under brooder lamps have no need for corn to generate body heat. Given the choice of scratch or feed they most likely will prefer to eat all the scratch before touching the starter feed. They need the...