Effects of Hoof Trimming on Feed Consumption, Milk Yield, Oxidant and Antioxidant System in Dairy Cows with Hoof Deformities

Abstract In this study is objectived to reveal the importance of hoof trimming (HT) in cows by determining the changes in feed consumption, milk yield, oxidant, and antioxidant parameters in the days before and after HT in cows with hoof deformities. This research was conducted on 12 female Brown Swiss dairy cows mid to late lactation period that had healthy hooves showing symptoms lameness due to hoof deformities. Daily feed consumption and milk yield findings were recorded on days the 1,7 (before HT), 13 (on the day of HT), 19,25, and 31 (after HT) of the study. Total oxidant capacity (TOC) and total antioxidant capacity (TAC) tests for determination of oxidative stress index, for the evaluation of antioxidant potential; glutathione peroxidase (GSH-Px), glutathione (GSH), superoxide dismutase (SOD) enzyme, Vitamin E, A, and C levels were measured in blood samples taken on the experiment days. According to the findings of this study, after HT increased feed consumption and milk yield in cows ( P < 0.05). After HT, TOC decreased ( P < 0.05), TAC ( P < 0.05), GSH-Px ( P < 0.05, P < 0.001), GSH ( P < 0.05, P < 0.001), SOD ( P < 0.05, P < 0.001), Vitamin E ( P < 0.05, P < 0.001) and Vitamin C ( P 0.05) levels did not change significantly. Results of this study showed that HT, the oxidant system was suppressed and the antioxidant system was supported in dairy cows with hoof deformities dad healthy hooves.