I have never used DMSO for this, so really can't say if it might work or not. Up to you if you want to try that or not. Did you look at my link on sugardine in my post above? I would try that. It's worked really well for me in a couple of really nasty cases. And it's relatively inexpensive and easy to get/make. The curette can be very helpful in helping to dig out the pus, since it's like a tiny spoon and not really sharp, it does less damage to tissue than cutting and can enable loosening of the adhered pus from the tissue. When you can feel 'hard' in there where it shouldn't be it's usually pus. As I said before, it can sometimes be a longer process requiring patience and persistence. I found the sugardine to gradually stop the formation of pus, and eventually help the tissues start to heal. You may need to repeatedly clean it out and pack it before you start to see progress. In one case my birds infection had tunneled through the foot and I had to lance farther away from the original lesion in order to get it all cleaned out and flushed well. In my birds case it went from the bottom of the foot to the ankle, so when flushing, the liquid came out the other end, top to bottom and bottom to top. It probably took me a week to stop seeing pus formation in that one. It's really necessary to remove any and all pus before it's going to start clearing up, any pus in there is going to keep it regenerating. I continued to repack it daily until I saw healing start. Every foot is a little different, it's very hard to predict how long it will take, but I would consider that it
might take months to get full healing. When the lesion is large or deep, I use the same curette to really pack the sugar in there, and then just drop some betadine into it, 1-3 drops is usually good, depends on size, etc., and let it wick in. Then wrap it to protect it and keep it all in place. It has also significantly reduced swelling fairly quickly as well. I was going to euthanize a roo who was really bad, I'd tried litterally everything else and nothing was getting it. I did not want to cut his foot again. So I did this as a last ditch try, and it saved him and he lived for many years after bumblefoot free.
When you do your cleaning, I keep all my bumblefoot supplies in a rubbermaid container so it's all ready. It easier when you have everything on hand in front of you, than having to go hunt for the thing you forgot (ask me how I know that). I wrap the bird in a large bath towel and lay them on their back on another towel, cover the head with a lighter weight towel, and usually they will lay fairly still. Have paper towels, syringes for flushing, sterile saline or diluted betadine for flushing, all your bandaging materials, everything you think you might need, and a ziplock bag for putting all the yuck in afterward, for disposal. If you have some bandage scissors, that makes removal of the old bandage a lot quicker, especially if you are using vet wrap or co wrap. You can get them in many pharmacy's in the first aid section, or on
Amazon. I have a very tiny pair that work really well for chicken feet. Take your time, I think that's the hardest thing.
If you have questions that I haven't covered, after you read the previous post's link, I'll do my best to answer them.