Google average lifespan of dairy cow. 90% of cows are allowed 3 lactations and then slaughtered.They are often lame, covered in shit and have udders which are hideously expanded to allow them to produce far more milk than nature intended. Pastures are bombarded with nitrates which encourage abnormal grass growth to feed these Sci Fi cows. The nitrates, in turn, f**k up the natural ecology of the our streams and rivers and contribute to the demise of fish; in particular trout and salmon. Oh and burping, farting, cows are a significant contributor to greenhouse gases. But I have to hold my hand