Abstract
During the last six years we have repeatedly observed a syndrome, diagnosed as blue comb disease, whenever pullets, cockerels or yearling hens were transferred from floor pens to individual cages. The incidence of outbreaks was generally low (below 10%) and always seemed to affect the birds in pairs, namely birds facing each other on the same tier of the battery. Only very rarely was an individual bird affected without the same condition being observed in its neighbor on the opposite side of the tier.Last year we decided to study the effect of a certain drug affecting electrolyte metabolism in alleviating this condition. After a group of young pullets had again been transferred from floor to cage housing we waited for the usual occurrence and diagnosis of blue comb disease. Nineteen birds were afflicted at the end of one week after transfer and these were moved to another location with…
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