When you lanced the swelling, did you see any white or cream or pale yellow stuff inside? Chicken pus is firm, rather than liquid, and can take some manipulation to get it loose and removed. I'm not a fan of Blu-kote as it makes it very hard to see the color of tissue to see what's going on. I've circled the area's that I think are of concern in pictures below, with notes. I would continue daily soaks until you can get all the blu-kote off so things look more normally colored, that will make it easier to see. It will also help soften things that may need to be removed. An easier way to soak is to get a rubbermaid type container with a lid, a shallow one that they can stand in, cut a hole in the lid that the chicken fits through, fill with your epsom salt solution and put her in with feet in the solution, the lid with the hole will help keep her stationary. Hope that makes sense. When you are working on her feet, wrap her in a towel like a burrito, with her feet sticking out, and lay her on her back, give her a few seconds to calm. They usually are calmer and hold more still that way. I will often place a light weight cloth over their head also, also helps calm them since they can't see what is going on. Pictures in the order you posted them originally:
For this one, area circled, I can't tell if that is healthy tissue or not, due to the color, but appears swollen. I would use a q tip or cotton swab to clean out all those nooks and crevices, sometimes stuff gets stuck and built up in there. Possibly necrotic, but the color makes it too hard to tell.
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This is where you lanced? The arrow is pointing to what is either scab, pus, or necrotic and that needs to be removed and cleaned out. Again, the color stain makes things harder to see. If any pus remains it will keep regenerating. I also use a larger oral syringe to help flush things out while cleaning, with a roll of paper towels on hand. Once you get it all out, pack the hole with plain triple antibiotic ointment and wrap it up to keep it clean and dry. You will need to change the bandage and check it daily until you know it's healing. You may have to repeat cleaning. If it doesn't start to heal or keeps regenerating, then sugardine can work well as treatment, I will put a link at the end of this post with more info on that.
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I circled what appears to be early bumblefoot on the third picture below. It doesn't appear swollen, and may be very superficial. For that one I would try to clean and treat topically, see if it starts to clear up. Sometimes those shallow ones can be slow to resolve. I would clean it up, apply the antibiotic ointment daily, and wrap to keep it clean and dry.
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Where I circled below, again I would clean out the creases and pockets with a q tip or cotton swab, making sure there is no gunk in there.
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Here is info on sugardine use, I've had good results with it for some really stubborn bumblefoot, but it isn't necessarily quick. Bumblefoot can be a slow process that requires perseverence.
Post #8 in this thread:
https://www.backyardchickens.com/threads/bumblefoot-not-healing.1443