s bahadoran
M Hassanzadeh - Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran- Iran.

two hundred and fifty and fifty day - old broiler chickens were housed in a high altitude farm and divided in two experimantal groups (cold -exposed and control) thmean and followed by samples taken at seven, 14and 28 days, both groups of chickens were exposed to a low environmental temperature. for hormonal analyses, blood samples were taken at days theree and four )before and after cold exposure), and followed by samples taken at seven, 14, 28and 42 days.

broiler chicens, asclites syndrome cold exposure, throid hormones