CAT and mastitis: Mastitis-induced group showed significantly increased thiobarbituric acid reacting substances (TBARS) levels (p < 0.01) and significantly decreased Superoxide dismutase (SOD), Glutathione- S- transferase (GST), catalase (CAT), reduced glutathione (GSH), and glutathione peroxidase (GPx) activities (p < 0.01) compared to group I. Improvements were observed in groups IV, VI, V, and III.