If the cow is lame, lincomycin will do. Lincomycin also has a very good effect on streptococci. Lincomycin is a chloramphenicol. When combined with cephalosporins, they are antagonistic to each other or have counteracting effects or produce side effects. They should be used separately with an interval of two hours. Cow lameness is caused by streptococcus, which has a synergistic effect with lincomycin. The treatment effect is good.