This morning when I let out the little chickens one of them was gasping and gurgling. we took it to the vet and it died there. the vet said it was some sort of cold, flu, virus thing. ceraditus ( have no clue how to spell that, don't even know what it is ) or something. So does anyone know what it could be? is it this virus thing? how could they have gotten it? how do I stop the others getting it? what do I do if another one gets it? Please help. These chicks are light sussex and are 6 weeks old. I am going to use them for breeding.