That looks like it still has infection in it. I have a roo that has had very stubborn bumblefoot that is the type that has stringy/ribbony pus through the foot rather than a compact plug. It's much harder to treat it as it's much harder to get it really cleaned out well, it sometimes tunnels through the foot. My first go round with my roo it took over a year and multiple procedures to get it to finally heal, no fun for either of us. He was good for about a year and a half and then had bumblefoot again. Second time around I cleaned it out as normal, but then used sugardine to treat instead. Sugardine is used on horses for hoof infections and thrush.
I will attach a video on it below. Sugardine is made with plain white sugar mixed with betadine. Pack the wound with it, then cover and wrap. Since their feet are relatively small and not much is needed I just packed the wound with the sugar and then added 1-3 drops of betadine and let it wick in, worked better that way for me. I did this daily at the beginning, as time went on I was able to go to every other day. I covered the sugardine with Duoderm CGF bandages (you can get them on amazon -
https://www.amazon.com/DUODERM-CGF-4x4-Box-187660/dp/B001V9JUVE/ref=sr_1_3?crid=IYP6SPAVMZ89&dchild=1&keywords=duoderm+cgf+4x4&qid=1612818908&sprefix=duoderm+,aps,624&sr=8-3) cut to size, they adhere to the skin but not the wound and hold it all in well. Cut to size you can get a lot of them out of a box of 5. Then wrap with vet wrap or co wrap bandaging. It also helps the wound to heal from the inside out, and not trap pockets of infection in there. It is not a quick process, it ended up taking about 5 months to get it to heal enough to leave bandages off. At first you may continue to see pus forming, so clean it out as best you can each time, reapply the sugardine, eventually the pus should stop forming. I don't have a before picture, but this is the foot after about 3.5 months of only cleaning and sugardine treatments (the dark part is just dirt-had just removed the wrap):
View attachment 2521962
You can see the original margins of the lesion outside the pink part, where the tissue has filled in, it was pretty large. Despite the length of time it took this was much quicker than his first bout and healed much better.
If this roo of yours is constantly having issues then once he's healed up you might want to consider birdie booties for him, to protect his feet.
http://www.hensaver.com/Birdy-Bootie.html
Lowering roosts and making sure he's not jumping down from things too high, since he's heavy, may also help.
