I am having very very similar issues if you read my post from early today. 2 chickens 14 months old dead the last 2 weeks with the same symptoms. I am treating with corid now. I have also been thinking of treating for worms. Let me know how your flock is doing and I will try to do the same
I have had my flock of 7 chickens for over a year. I am now down to 5. 2 weeks ago my BO was having trouble standing, breathing heavy and died within the hour. Yesterday I came out and an EE was very lethargic and having trouble keeping eyes open. Occasionally drinking water and now dead today...
We have a similar situation. 5x5 with seven hens. I add chips after about 3 weeks and clean it out completely every 6. Usually let my nose and eyes tell me its time