This study was conducted during an outbreak of urolithiasis of (gout) in a flock of caged layers. The clinical findings of the condition were depression, emaciation, dehydration and decrease in egg production 13%. Mortality rate was 15%. The necropsy findings of dead birds showed white chalk-like deposits covering the surface of various abdominal organs as well as the pericardium, kidney tissues swollen and covered with white urate. Diagnosis was made by feed analysis which showed excess of calcium 4.27%, characteristic necropsy findings, and response to the treatment.