Her leg looks so much better than it did before, I feel like it's going to be a lot longer than two weeks before whatever amputates amputates, and I'm not sure if it's going to go at the knee or below, I guess we'll see. Today was her last day on antibiotics, I feel like an expert at giving intramuscular injections now.
Here are some new pictures-ignore the spot of urate on the end of her leg she stepped in it when I got her from the coop and I washed it off with peroxide. I also cleaned the coop.
Here is the suspected pressure sore
And this is her leg after the first application of hydrogel...
I had her sit on the porch with me while it soaked in. The curad worked well at keeping it clean but it sealed in some pin feathers despite my best efforts so they are protected with hydrogel as well.
I understand your concern about infection. And your concern is justified; infection should be your greatest current concern as far as Rosie's recovery. What Wyorp Rock said about the green spot possibly being bruising is plausible and makes sense, especially if it appeared shortly after you plucked the pin feathers.
Rosie's current photos are beyond my expertise and knowledge to give any medical input. (Thats why i previously tagged some that know more than me). A limb auto-amputating due to frostbite or other injury is different from a limb being surgically amputated.
I dont know if you've yet had time to read about the difference between wet and dry gangrene. I did a little reading, & learned that wet gangrene is caused by one of two bacteria, Clostridium perfringes or Bacillus fusiformis. Penicillin is the best antibiotic to treat both. But from what i read, if Rosie had wet gangrene you would definitely know it. Greenish-black swollen skin with a very foul odor, and the skin may be "crinkly" when you touched it. So from what you've described, Rosie likely doesnt have wet gangrene. But it's still possible for her wound to get infected from e. coli or other bacteria. The reason its imperative to keep the wound clean and dry.
Because only You can see, touch and smell Rosie's wound, i urge you to dive deep into surgical amputation post-surgical care, possible complications, etc etc. You will probably find much more info from human cases, but plenty of other cases from mammals & birds too. I think it will help you better understand Rosie's situation and what you are seeing. And please share what you learn here, because you will be helping others learn too.
I'm writing this on my break,
I've read up on it a bit but I haven't had time to do deep research between my shifts. I have off tomorrow night so I will study up then-
Part of my lack of knowledge is there aren't many sources for injuries like this in chickens, so I will make sure to read up on human and other animal cases. I have been looking at other post amputation and auto amputation threads on BYC though, and have found them extremely informative.
And the green is gone so it was definitely bruising, she got spots like that around most of the ingrown feathers after I freed them, and they're all gone today. I panicked a bit remembering how my other hen looked.
Thank you everybody! Unless her condition changes I'll update in a few days.
If anyone has anymore thoughts please share, everything helps