I've got a Cornish who is about 3 months old. The folks I got her from named her "Tubby" because she got so big so fast. But she seems like she has trouble walking, sometimes, and will sooner lie down than stand, even eating. Sometimes, it seems like her legs just collapse out from under her, and down she goes. Has she just grown so fast she has coordination problems? I know Cornish are supposed to bulk up fast, and I wonder if she put on more weight than her frame can handle? She really is huge. Twice the size of the other two chickens we got from these folks. (These chickens were being raised in the house by their daughter, and got too big for being house pets.) Will she get better at getting around later, or are these just heavy, clumsy birds, overall? She doesn't deal well with perching, so just settles down on the ground a lot. Sweet little chicken, but she really seems like it takes a lot out of her to get around.