Male dairy calves are worth so little that they are often shot after birth, but beef calves are worth much more. Implanting a beef cattle embryo in a dairy cow could increase profitability and cut greenhouse gas emissions
Source:
https://www.newscientist.com/article/2256838-implanting-beef-cattle-embryos-in-dairy-cows-makes-them-more-lucrative/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home