My prediction: There will always be a market for real meat and real leather. If/when the major sources of the two are "not-real" the producers of real meat and

My prediction: There will always be a market for real meat and real leather. If/when the major sources of the two are "not-real" the producers of real meat and leather will be seen as a luxury, so the remaining cows bred to produce meat and leather will be cared for well to produce high quality outputs. So the population will drop but those that remain will be bred to produce luxury goods and so be kept in better conditions.