I've been following this since I had a hen that had similar issues a while back. She had already been dosed with safeguard, so I have her some antibiotics, then hit her with safeguard again. I also gave her probiotics. I think she had an infection due to all the roosters treated her like she was the only hen even though there were over 20 others ..... then I had given probiotics too long (learned the hard way that too much of a good thing is always bad!). It was nice reading what someone else does for a similar problem.