Van Rooijen comments on Beilharz’s suggestion (IJSAP 3(2), 117) that it may be possible to adapt domestic animals to existing husbandry systems rather than adapt the systems to the animals. For example, Beilharz cites Tschanz, who has written that the best measurement of adaptation to an environment is reproduction. Van Rooijen provides an example of two bulls – one living freely with a group of cows and one used as a sperm donor, where welfare and reproductive success are not necessarily in harmony. He concludes that the evolutionary fitness and welfare of farm animals do not necessarily coincide
Van Rooijen, J.
"Genetic Adaptation and Welfare,"
International Journal for the Study of Animal Problems: Vol. 4:
3, Article 9.
Available at: https://www.wellbeingintlstudiesrepository.org/ijsap/vol4/iss3/9