well, everyone may have to stop eating meat at some point, due to the enviromentall issues it brings, however what needs to be considered is that this change will be a gradual one, meaning as demand for meat lowers, the supply will lower too and less animals will be bred in the first place, and as for thoes left, they can live out their lives in animal sancturys
Animals rescused from slaughter houses go to rescues to live out the rest of their lives happily and free. Animals are being forcibly bred for meat and dairy. If animals were freed from slavery, then the natural order of the eco system would return.