If your vet will take a look at it, that may be best. I've got a roo we are going on 6 months with, with the worst bumblefoot I've personally dealt with. I'm doubtful at this point that I'm going to be successful with this one. His was not large at all when found, but the infection was not a nice compact kernal, it was ribbony and stringy and was pretty deep in the foot. You may have to dig or cut deeply to get it all, and if that's not something you are comfortable with, then the vet is best. I've had ups and downs with this, thought I had it at one point, but it came back. I've done multiple antibiotics, multiple surgeries, tricide neo soaks, honey packs, sugardine poultices, pretty much everything both traditional and non-tradiional for treatments. Yesterday found his ankle swollen, so it's spread. I had better luck packing his wounds with manuka honey than with topical antibiotic ointment, that was how I got to where I thought I had it beat. When you are feeling his foot, if you feel any hard spots inside, that's likely more infection. I've gotten chunks of it out of more than one spot on these feet because of the way the infection has wound it's way through the foot, and you may have to REALLY squeeze to get some of it out. I would keep trying as long as you feel there is hope, and as long as you are willing to spend the time, only you can decide when it's not really doing any good anymore. Most bumblefoot is much more straightforward than this, but once in a while this can happen. I'm not trying to be discouraging, this is just my experience with this particular case. I've done some before that were pretty easy and not much of a big deal at all. I wish you luck and will be watching to see if you have success and with what treatment.