As they are forced to live in their own urine and faeces, they suffer urine scold on their skins, and their sensitive lungs are damaged due to the intense ammonia smell of their urine. They suffer heart attacks because of their rapid growth and often have broken legs due to the extraordinary weight of their bodies on their tiny bones. Of course with broken legs, they are unable to reach reach food or water. These birds are often cannibalized by other chickens as a more easily reachable food source.
The fully grown, dressed chickens in the supermarkets, are only 6 weeks old.