Once inside the barn, it is noticed that there is something like fog or fine dust at eye level or windows
The presence of a distinctive unpleasant smell, which is the smell of ammonia gas, which you can notice immediately upon entering the farm, and it is a stinging and irritating smell
Observing excessive moisture in the barn litter, which is a cumulative result
Observing moisture on the walls and windows (steam - droplets), which is an instantaneous condition that can disappear immediately after good ventilation
Note the weak demand for feed and the lack of a high appetite among birds
General lethargy in the herd, the presence of sloths, and a lack of activity and vitality
Gathering near the walls and away from feeders and watering cans
There is a discrepancy in the flock weights and a large percentage of the birds did not reach the required weights according to age
The appearance of respiratory symptoms such as sneezing, coughing or difficulty breathing
The appearance of inflammation, redness and congestion in the bird's eyes, along with ocular secretions
