This is more of a what would you do question. Our neighbor has chickens, ducks and turkeys. We have chickens (had 21), 11 ducks and 2 guineas. Over a month ago (late August?), my husband brought home some adult chickens totally against my advice (because we didn't have sufficient quarantine space). Well, they died and all of our chickens have been sick. We had a sick rooster euthanized for testing and his main infection was Infectious Bronchitis (very high titers) with secondary minor infections of MG and mild form of Newcastle. The vet said most backyard flocks have MG and they catch it from songbirds, so she wouldn't cull based on that. We have lost 11 of our chickens. We've treated with the recommended antibiotics. Trying to be neighborly, we let our neighbor know so he could amp up immune boosting protocol for his flock. The wind blows from his place to ours, his yard is higher ground so any rain flow comes our way. The two flock yards are probably 100 feet apart and our chickens usually stick closer to our side than his. Now he's trying to convince us (threaten?) to cull (not sure if just chickens or the entire flock). Yesterday he said he wouldn't want to have to ask us to replace his birds if they die and today he said he thought about contacting the country health department. We took our rooster to the University Ag Vet who has to report serious infections to the powers that be. Our birds don't fall under that. My husband wants to give a chance for recovery for those birds who can. The remaining hens and 1 rooster seem to be on the upswing and are eating, drinking and free ranging. Of course, I absolutely do not want to pass this to his birds and can see his concern. My husband is super stubborn and after the veiled threat of calling the Health Dept. he's dug his heels in deeper. I don't want to unnecessarily put the neighbor's flock at risk, but as long as our chickens have been sick, it seems if his were going to catch anything from ours, they would have by now. What would you do? Could we even be legally liable for his birds if we've taken precautions?