<![CDATA[Noise is an environmental stress factor that can affect the physiological condition of livestocks. In modern farms, noise sources such as ventilation and automatic equipment can potentially disrupt the health and growth of chickens. This study aimed to examine the effects of noise exposure on the blood profile and weight gain of broiler chicks (Gallus domesticus L.). Fifteen one-week-old male broiler chicks were divided into three treatment groups—control, 85 dB noise, and 100 dB noise—with five chicks per group housed in a single cage. Exposure of noise was given for 30 days. The observed parameters included the number of erythrocyte, leukocyte, heterophile/lymphocyte ratio (H/L), random blood glucose (RBG) levels, and body weight gain. The data were analyzed using ANOVA, followed by Tukey-HSD test (α = 0.05). The results of this study showed that noise exposure significantly (p < 0.05) reduced the number of erythrocyte (control: 3.658, 85dB: 3.136, and 100dB: 2.802 ×10⁶cells/mm³) and RBG levels (control: 191.4, 85 dB: 180.0, and 100 dB: 156.8 mg/dL), but had no significant effect (p > 0.05) on the number of leukocyte (control: 1.620, 85 dB: 1.300, 100 dB: 1.100 ×103cells/mm³) and the H/L ratio (control: 0.087, 85 dB: 0.099, 100 dB: 0.093). Body weight gain in the noise-exposed groups was significantly lower than that in the control group (p < 0.05; control: 399.8, 85dB: 341.8, and 100dB: 312 g). These findings indicate that noise exposure at 85 and 100 dB may have negative effects on physiological conditions and growth.]]>
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