Very a.i, not the worst to be honest, but using a.i for business advertising gives a cheap and unprofessional impression.
However, with some editing, it would be fine.
I would stop all the treats and get a higher protein feed just for the general well-being of your flock but it's likely just them getting into a cycle of abuse.
The banty gets into a meek mindset and acts sick, the flock picks up on that and tries to get her away from them and she feels worse wtc.