Abstract: The purpose of this experiment is to study the effect of carophyll red on RUIC,Cr and BUN in chicken. 90 19-week-old healthy Hailan chicken were randomly divided into three groups including the control group(0 mg/kg),the low does group(80 mg/kg) and the high dose group(8000 mg/kg). The drug was continuously administrated for 30 days, and then was stopped for 30 days. The RUIC, Cr and BUN were examined each 10 days. The three indexes in both withdrawal period and administration period of each group had no significant differences compared with the control group(P＞0.05). If the Hailan chicken were fed by fodder including carophyll red for a long time, the chicken might be caused gout and renal lesions.

Key words: carophyll red; RUIC; Cr; BUN; Hailan chicken