My duck developed a sudden lump on her middle toe joint about a month ago - no puncture wound or bumblefoot infection. I was able to get her to the vet a week after discovering the lump. We did an x-ray and a blood draw. White blood counts were only on the high side of normal, and x-ray showed a lot of inflammation but nothing else. For two weeks she was on Clavamox and Celecoxib and I didn't see any real change, other than that she was no longer favoring the foot and running around as normal. She was then off antibiotics for a week and then a week ago we started Trimeth Sulfa. Her foot appears unchanged - maybe a tiny bit bigger than it was the first round of antibiotics. I will keep her on this new one for a few more days, but the vet said if there's no improvement I should go off it after 10-14 days. I'm wondering whether I should try another antibiotic, or not. I'm concerned about exposing her little system to so many antibiotics! I have Baytril and Doxy as options. I have a re-check appointment at the vet for end of this coming week, but I don't know if there's any point in going as he has no idea what the problem is and everytime I go it ends up being a few hundred dollars. Attaching the x-ray and a photo of her foot.