I’ll just post photos of how it looks now to avoid confusion. While it is infected for sure, I wouldn’t describe the discharge coming out of this as purulent as an abscess would be. It is weird to say the least. The original lesion to me looked like a kind of skin carcinoma. This could have allowed for bacteria to enter, causing multiple symptoms. We do not have rats, and even if we did, there is no way they could have gotten to these chicks. They go inside at night in a box with fresh hay and go outside first thing in a 4x8 pen lined with gopher wire. While I normally would have at least tried to treat this at the beginning stages (even with it’s odd presentation), I just couldn’t with my crazy life and decided if she makes it she makes it. I’m just curious if anybody has seen anything like this themselves. I agree cancer would be unusual at this age, but it can happen, especially if the genetics are right (and this is a brand new breed).