I am sure we would still have some number of dairy cows like the lovely highland cows that this person takes care of: https://www.youtube.com/watch?v=YmBYs53quP8

Their population would be greatly reduced, but is having a billion consciousnesses in a mediocre state and potentially suffering somehow better than having a few orders of magnitude fewer consciousnesses that are properly cared for and living more "natural" lives? It is hard to say without getting into the details, but from a high-level utilitarian perspective, one feels that the latter is somehow more preferable, although doing any kind of arithmetic with souls is a risky business.