An experiment with male layer-type chickens was carried out in the Institute of Animal Science-Kostinbrod, aiming to investigate their growth performance and carcass composition, as well cooking loss tenderness meat at age 5 9 weeks. The birds were reared controlled microclimate, initial stocking density 22 birds/m2. After weeks age, fragmentation applied it diminished 7 Chickens slaughtered 10...

Infectious coryza is a well-recognized and commonly encountered upper respiratory tract disease of chickens that is caused by the bacterium Haemophilus paragallinarum. The occurrence of recent outbreaks in North America has emphasized that the disease can be significant in meat chickens as well as layer chickens. In developing countries, coryza is commonly complicated by the presence of a range...