The explanation behind this is actually pretty disturbing. Due to selective breeding ~~the growth hormones we feed chickens~~ in America, the chickens become fully grown much earlier than usual. It's like the equivalent of becoming a fully grown adult by the time you are the age of five, but you still have the mental and muscle capacity of a five year old.
Between 1957 and 2005, chickens raised for their meat quadrupled in size due to selective breeding. They grow to their slaughter weight in just 6 weeks, and their legs often struggle to support their own body weight.
I literally corrected the sentence from "hormones" to "selective breeding" and it's still factual. Simple mistake. I don't watch shitty Facebook videos, and my brain isn't rotten... I just miss remembered what I assume was the scene from super size me 2 mentioned by another poster.
I also included a quote and a citation and my original post about how they grow so large so fast they often collapse under their own weight.
Truly the greatest of errors misremebering that was because of hormones ๐