This sounds like it could be describing the plight of an animal kept in captivity under harsh conditions, possibly in a zoo or a similar setting. The use of “confined in a small cage for life” suggests long-term captivity, while “full of waste” indicates unsanitary conditions. The phrase “when rotten she was left there completely atrophied” evokes a sense of neglect and deterioration over time, both physically and possibly mentally.
If this is a metaphor or a poetic description, it might symbolize someone who has been trapped or confined in a detrimental situation, leading to physical and emotional decay. The use of “she” could imply a female subject, possibly highlighting vulnerability or a specific identity.
Could you share more about the context or your thoughts on this expression?