Ansu -Yeboah

I do have layers which are 21 weeks old. They are dying in numbers, now averaging 30 birds a day.  I have 56,000 layers . They have difficulty laying and at times the eggs get tack in their rectum. They appear to have difficulties breathing and earlier post-mortem shows that they have flems in their throat. they way average of 1650 kg/bird. There is no overcrowding, no pecking has been observ ...