I just want to say to anyone battling with bumblefoot... DO NOT GIVE UP! and do not take a vets advice! If I had my duck would’ve been put to sleep now. As I continued looking every couple of days it seemed the infection was rising to the surface and now I’m left with this tiny hole. With perseverance, no matter how severe it is, you can treat it. Of course I would advise the antibiotics alongside, but if your duck is tame enough and trusts you enough, it’s something /YOU/ can do without a vet and their extortionate prices.