Ive had alot of experience with bumblefoot and here's what I think:
it looks great for this stage and its healing.
I would stop the iodine because that is a little strong.
You have to let it heal and just warm soaks and washing with soap should be fine.
I would inject it directly with tylan. I havent found that systemic injections (like, in the breast or thigh) work well unless the chicken has
a secondary infection or the bumbelfoot in in stage 4 or worse.
The staph infection makes a kernel and it has to come out.
I have tried tri neo and it doesnt work...it may work on very early cases but all it does is cause a temporary healing while the kernel is still in there moving along.
The foot will get pus and the kernel will travel...it will compartmentalize and work its way up between the toes (sometimes coming out on top) and also destroying the
tendons and cartridge.
you can allow it to slowly happen if the bird is not acting lame, but it will destroy the bird eventually.
The surgery (and please search out the bumblefoot surgery thread here to see how well you really did) is a very, very bloody affair. The best way to do it, if you can, is to lay the bird on her side on
the kitchen counter with feet under the faucet so you can continuously run water as you need it.
You need to knead and push the thing to break it up and hollow it out agressively (but not so much as you touch the tendons)
The problem is that the infection splits and if there is even a tiny bit of the hard kernel in there it will fester and continue to come back
Expect blood....if youre doing it right it will bleed alot.
either keep papers towels all around it (I do that alot) or wrap her in a towel and use the sink.
Right now, it looks like its healing. I would wrap it with neosporin and wait a few days and then take it out and re-wrap it....you can wash it but dont soak in anything as strong as iodine.
Spray it with bactine (THE best thing for bird injuries...I use i all the time)
and inject it directly with Tylan 50 or the penn.
If it starts to look like the pus is coming back, massage and scrape...see if there is more in there.
I find that by keeping it wrapped and waiting a few days in between the thing starts to work out rather than in....
But dont assume you got it with that one little thing. If you look on my meetup page in the photos I have some pics of a bird's foot that had been let go...someone gave me the bird and she didnt even notice or
know what bumblefoot was. I lost that bird. But it had 3 or 4 huge bumbles...and the light ones are no always the main one...it should be more yellow.
The pus is very hard sometimes...
at this point, your bird looks like her foot is healing...and maybe you got it.
I wouldn't do more than wash it, inject antibiotics as long as its open, and change bandages...
see if it gets red or hard and swollen.
IF she acts sick and is not eating etc...then give her a full course of injections at .5cc (or .6 as you figured) per day for 5-7 days
also try some apple cider vinegar in her water and yogurt etc...make her a mash and give her some eggs scrambled or hard boiled and crushed.
You can get tylan etc...at randall burkey, valley vet, ...or...whats the one with the chicken Dr guy?
I would not use the tri neo because it is very dangerous to YOU....you have to wear protective eye gear and also gloves...its very very caustic.
The penn is fine as long as you don't get the one with "cain" in the name.
Dont use anything with "cain" in it when you're injecting...I find that the neosporin with pain is OK topically on bumblefoot.
I had the misfortune to have a big run of this due to a dead thorn bush that I didnt notice...and so I researched and tried every med over 2+ years.
Its very common as staph is everywhere, but do wear gloves when removing it because you could get staph if you have an opening in your skin.
good luck...you really did a nice job!!