Cows can be potty trained as easily, if not more so, than toddlers, according to researchers at the University of Auckland in New Zealand. This is good because urine, mixed with feces becomes ammonia, which is an environmental concern.
Source: Associated Press, September 13, 2021. Link. If it could be done, toilet training makes it easier to manage waste products and reduce greenhouse gas emissions, said Donald Broom, a professor of animal welfare at the University of Cambridge in England.