I feel sort of stupid, but what are scratch grains and should I be feeding them? Also, my silkies are around 14 weeks old now, and I still have them on grower/starter feed. At what age should I change them to something else, and what should I put them on? I've heard several different things. These are strictly pets.....not for eating or eggs. At what age can I stop adding antibiotics to their water? I've been adding it since I got them at 3 days old.