One of my three week old chicks that we hatched out, suddenly cannot stand. I noticed this a couple of hours ago, but checked on her again and she was laying on her side. I put a couple of small meal worms in front of her and she ate them. She is kept with four other chicks, who appear to be normal as of now. She also is cheeping and seems healthy but very tired and is sitting in my lap right now. Any advice is so appreciated and besides her, I'm wondering if this might affect the other little chicks.