Ok my silkies are now about 7 weeks old and i was wondering if 7 weeks is too early to start to give them a little scratch as a treat? I bought a bag of the purina kind that has different grains in it. I opened the bag it and it looks like really good quality. It doesn't have any corn cob in it from what ive seen. Is it better to give them just the regular crushed corn or is this kind good too?... Thanks for your input LEBE