For those not averse to some challenging reading, I here share two papers on the miserable existence of broiler breeders. This paper demonstrates the existence of their misery
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0102322
This paper asks how to assess it to improve it https://www.sciencedirect.com/science/article/pii/S003257912100609X?via=ihub
These poor birds are the result of a selection process that grows a chicken big enough for us to eat in 45 days, or thereabouts. If you try to grow one beyond that age, they will have issues unless you follow industrial chicken production procedures.
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0102322
This paper asks how to assess it to improve it https://www.sciencedirect.com/science/article/pii/S003257912100609X?via=ihub
These poor birds are the result of a selection process that grows a chicken big enough for us to eat in 45 days, or thereabouts. If you try to grow one beyond that age, they will have issues unless you follow industrial chicken production procedures.