I have a 3 day old baby Sebright. The baby is so small and is half the size of the rest of the babies. She is weak and sleeps a lot. It scares me that when she's like this, she will not eat/drink on her own. I give her water and egg whites and has access to Chick Starter food. She perks up for a while and all is well, then she slips back. Suggestions needed and appreciated. I'm new to raising chicks.