We're back from the vet. Peggy is getting along very well. Mark is still concerned about Jan's bacterial infection. He's taken a swab and will be in touch about next steps. She may have an abscess we can't see without taking images, but that's not guaranteed. I think I've mentioned before that his diagnostic procedure is cautious and usually goes like this: maybe this, maybe that, try broad spectrum antibiotics, check chicken, try stronger broad spectrum, check chicken, take an image, see what it suggests, maybe surgery, eureka! Found the problem, 100% certainty.