Hey folks, I have nine, 5 day old chicks (3 LH, 2 EE, 2RIR, 2PR), and have read multiple places about giving them some plain yogurt. Can anyone tell me when I should start? How much should I give? How long should I give it? Same for vitamins. I didn't give them sugar water (read about that too late), but all are currently happy and chirping away. When should I start chick vitamins? Thanks!