Hello i just got my first chickens 6-8 weeks old from a local breeder. I was out changing their food and water this evening after work and noticed discoloration on the back of my rhode island white. I pushed her feathers apart and noticed a raised black crusty area on her back. It smelled like an abscess. I took her inside and used water to syringe/spray her down and remove the scabbing. I found a second sore above. The bottom store is round and raised and hard like it's attached to the bone. The too sore is looser and has some holes where festhers cam out when cleaning it. There is a bad odor. I applied a chlorhexidine gluconate antiseptic. Any ideas what is causing it??!