Hello! I'm going to address two separate problems here, so apologies in advance if that confuses you. For a little background, I have ten chicks between one and two weeks old. They have a little less than a square foot each in a cardboard box brooding system with a Mama Heating Pad. We're planning to expand the brooder again tomorrow. Our bedding is pine shavings. We got all chicks from the same store, which buys all of their chicks from the same hatchery. They have not been medicated and aren't on medicated feed. 8 out of the ten chicks are perfectly healthy. Of the two that aren't, the one I'm most worried about has what I think is a lame leg. This chick is about one week old, and while she is the same age as our four other 1 week old chicks she is now definitely the smallest (all standard breeds, including her.) She was moving around fine when we got her last Friday, but about three days ago we noticed her limping. One of her legs will not support any of her weight. She kind of hops around on her one good leg, uses her wings on the ground for balance, and lays around a lot. She seems very cold and sleepy; we take them out to play under a heat lamp sometimes, and she always lays down right under it. When she tries to use her leg, it gives out on her completely. Thing I know for sure: This problem has developed since we brought her home Her leg is not paralyzed (she can still move it, it just can't support her.) She still has nerves in her leg (another chick pecked it today and she squaked; she reacts when I touch it) Her leg will not support any weight It's not splay leg (it's not out to the side, and she has control of where it is compared to her body) It's not dislocated/ broken (this one I'm pretty sure of- I've moved the leg in walking motions and applied light pressure to everywhere from her hip to her toes, none of which has caused her any pain) There are no peck marks/ blood/ other visible injuries Any advice would be very much appreciated. We'll probably move her and our second smallest chick, a cochin, into an isolation brooder tomorrow where it's easier for her to get around. She's a Barnevelder, if that counts for anything. She's eating and drinking a little, and her poops, when she poops, are pretty healthy (a little slimy, but nothing out of the ordinary.) The second chick problem is much less severe. Our two week old sussex has developed what I think is some kind a respiratory issue; when she breathes it sounds moist and almost crackly sometimes, and she keeps sneezing. She's eating very well, drinking well, and has perfectly healthy poops. She's very active, and still very much our head chick. I'm mostly asking because it sounds weird and I think I've heard another one of the chicks start to sneeze a little. Any info or advice is welcome. Thank you all so much!