History- Had MG 3 years ago, took appropriate measures, returned 2 years ago, took appropriate measures, no signs this year. Doing a complete re-stock with new birds this year to confirm it's gone. Chicks in grow out pen far away from location of last flock that MAY had still had latent, no signs, undetectable by two necropsy, disease.
Issue- Checked 4 weeks olds at 2Pm, all well and active. At 5PM discovered a cockerel coughing, sneezing, lethargic. Pulled it, ran it to med room, by the time, about 2 minutes, it was bleeding from mouth. Slit throat, disposed of, sanitized and went out to still covered flock pens. Moved them to new grass. All were well. All well this morning.
Any Ideas?