I bought 5 chicks and their about 3-4 weeks now and they've been fine. one was is the back of the cage and looked sick.. her feathers were puffed out and she looked really uncomfortable. i watched her for a while and left and now she's dead! my poor chickie. we have one more that is getting sick. she can't stand well and has trouble breathing. i put her in a seperate container and am keeping her warm. anyone know what to do? these are expencive breed..