Hen losing feathers, red patches appeared on breast today

[DavisNinja]

IMG_9505

• DavisNinja
• Jun 22, 2018

Princess Grace isn't looking too hot these days
A few weeks ago we noticed she was losing feathers on her breast and there was some swelling, so we treated her for sour crop (yogurt, apple cider vinegar, chamomile, massage, and one original instance of inducing vomiting). She perked right up after that and has been acting like her usual self, eating well and very energetic. We figured the feathers would start growing back in time, but today I noticed these red patches on her breast. She doesn't seem to be in distress at all, but this rash or whatever it is can't be good! Unfortunately I haven't been able to discern whether she is still laying, we have four Australorps in our flock and all their eggs look the same.
Any advice on what this might be and how we can treat her? We're total saps and she is family.
Thank you!

 

[oldhenlikesdogs]

Feather loss on the chest is generally from them rubbing them off while in the nestboxes or they pluck their feathers for better egg contact.