We bought 6 chicks, all female (3 Rhode Island Reds, 2 Wyandottes, and 1 Sussex). All have done great, except for 1 Wyandotte. Her growth is very slow, she's currently less than 1/2 the size of all the others, even the other Wyandotte. She is not maturing and getting her adult feathers like the others. She requires more heat than the others. And although she is eating and drinking fairly well and the others do not pick on her, she is weak and can only stand and walk for brief periods. She is alert and has no visible parasites, no respiratory problems, no unusual droppings, and no sores/ abnormalities, and no injuries. She's been like this for weeks. Could it be that she is just a runt and is a slow grower? Should I give her some sort of medicine for ringworm? What is wrong with the poor little girl???