All, I'm hoping you can help. I have two blrw chicks about 6 weeks old (maybe a bit younger) and they were walking just fine when I got them. Then they seemed to just lose muscle mass or something, and now can barely move around their pen. They seem otherwise healthy, but they just aren't walking properly anymore. They were living in a dark room with a light, but when it got hotter, I just turned off the light. Vitamin D deficiency? I had it happen to one other chick in my last batch, but the other 9 showed no signs. I have since moved the chicks outside where they can get more light, but I am wondering why both are affected. They are very chubby little chicks, but their legs look like they could support them. They can take a few steps over to water and food, and they are eating and drinking, just not walking properly. Any advice, experience, recommendations? All are appreciated. Thanks!