Probably the move to a new owner has upset her a little - hopefully she will get over it quickly, and start clucking again. You could send her here, because its broody paradise at the moment, and your girl could not fail but be broody about this lot!! I have three banties sitting in one nest, 3 more in a nest each, one in the spare rabbit hutch, one in another small hutch. and two big hens have joined in now .......so it must be catching.