This is an acute and highly contagious disease with gasping and spitting of blood. The lining of the windpipe swells up and sometimes the bird chokes to death. Sometimes this disease is contracted at poultry shows. Many fanciers who show their birds are sure to vaccinate for Laryngo. Vaccinate healthy birds 4 weeks of age or older, with an eyedropper. 1,000 dose bottle. We ship vaccines 2nd day, Mon-Wed to avoid week end. Indirect signature required.