Thank you. I'm really worried about her now. Penny is always tiny and is only half of the size of Bear. fisherlady suggested me give her scrambled egg yesterday, and I was so happy to see she ate a lot. Then she's in trouble again this morning.
Sorry she is having problems, if she is getting jostled a lot or picked on at all she may need further separation... today she needs some quiet time to recover from the stress she went through. I would continue to offer a mix of chick starter and scrambled eggs to her separate from the others so she doesn't need to compete for food and add chick vitamins to the water if you haven't already. I have even mixed a couple drops of nutri-drench in a tablespoon of water with a 1/2 teaspoon of brown sugar and gave it to weak chicks, can be given via spoon (just touch their beak to it's edge) or by dropper.