In ovo injection of cinnamon or clove alters the physiology and growth of broilers in a hot tropical environment

Abstract A study was conducted to evaluate the influence of in ovo feeding of clove and cinnamon on broilers. The experiment used 700 broiler (Ross 308) hatching eggs that were incubated at the recommended temperature of 37.8 °C. On day 17.5 of incubation, 100 eggs were randomly assigned to each of the following seven treatments: uninjected eggs (OE), eggs injected 0.5 mL distilled water (DH), 2 mg of clove, 4 mg of clove, 2 mg of cinnamon, 4 mg of cinnamon, and 3 mg of ascorbic acid (AC). During the posthatch period, the chicks were raised for 56 days. Data on physiological parameters, growth performance, and intestinal histomorphology were collected. Results revealed that the plasma triiodothyronine (T3) of AC and CV2 chicken was higher than the others. Additionally, the plasma malondialdehyde levels of the chickens of AC, CV2, and CM2 were improved significantly (P