Oh my what a journey. I have one hen that has had bumble foot since I got her as an adult two years ago

I tried antibiotics and surgery and neither worked. Shes four or five now and I'm at a loss for what to do. I'm not particularly emotionally attached to her, but I do want her to be comfortable and she's a great layer. However, constant vet appointments for an old hen are also a hard pill to swallow in terms of costs!
Then my favorite bird, a young and good layer, got bumblefoot. (She's in my profile pic.) Our journey is the same as yours... difficult giving syringe antibiotics. I miss more than I get it in her mouth. There doens't seem to be a significant improvement. I haven't been able to give epson salt baths. I'm so pressed for time on any given day so it's hard. I'm really hoping the antibiotics work!