Consider the "free-range" chicken. While it may have access to a small outdoor concrete porch for a few weeks, its breed has been genetically modified to grow so large so quickly that its legs often buckle under its own weight. It still faces the same transport and slaughterhouse stress as a battery hen. Welfare improves the hallway; rights asks why the building exists at all.

There are several current debates and challenges in the field of animal welfare and rights, including: