Hi Everyone! I'm new here. We've been having a hard time recently. We are new to chickens, and seem to have been having a lot of bad luck. Two of our hens died. The first one died a few weeks ago from a genetic immune system issue (apparently several from her batch also died around the same time). Yesterday we lost our Rhode Island Red to an intestinal tumor. That's just a bit of a back story. We got five chicks about three weeks ago. One of the chicks is very small. She always seemed to be sitting a lot whereas the other chicks were running around being active. I'm sure I'm personifying, but she seemed happy and would definitely get up and run around--she just seemed to like to sit. Last night we noticed that her legs look bow-legged. My husband described them as "chicken rickets." This morning I went in to check and it's getting worse. I am worried that she's probably not going to survive. She's about a third the size of the other chicks and overnight can't even seem to walk. What would you guys do? Let nature run it's course? Take her to the vet? Any suggestions would be greatly appreciated. Thank you! ETA: the chicks are probably 3.5 weeks old now.