Suicidal Cow Location

Listen here, you silly goose. You clearly need a lesson about basic wordplay. It's funny because they're saying the cows are at McDonald's, which is known for selling burgers, made of...wait for it...COW! It is implying that they are suicidal for going there. You know, like a chicken going to KFC? You just didn't get the sarcasm that is clearly on display.