I have a hen that has been indoors due to being will with a distended abdomen (periontitis). She just came off a 2 week treatment of Baytril on Friday. On Saturday I noticed she had a fishy smell around her head. I don't recall her having that before and I was giving her pills while she sat on my lap and I never detected the smell before. She was outside on Saturday eating earth worms, she also eats chick starter food as she is really under weight and has trouble eating pellets due to an over grown beak that I just noticed this weekend as well. She also eats rice, meal worms, and sprouts, and I also mix grit in with her food. I've read on sour crop, her crop has never been normal since I brought her indoors in January. Sometimes her crop feels mushy and sometimes it feels like I can feel pieces of grit in it, but she never has a huge full crop or a watery crop so I wouldn't think she had sour crop. The vet has recommended a culture but they said it would be anywhere from $150.0 to $200.00 total and I've already incurred a couple vet bills taking her in for her abdomen and I really can't afford to pay cash for another vet bill. So I'm trying to see if anyone has any experience with chickens having a fishy almost sour smell around their head area? I did notice before she was on Baytril she was occasionally shaking her head and opening her mouth and while on Baytril it went away, but returned as soon as she was off of it. Hopefully this will be enough info for someone out there to be able to provide some feedback! Thanks! P.S., she was also wormed with Valbazen about a week or two prior to the Batryl since she tested positive for round worm and tapeworm so I am ruling out worms since the Valbazen is supposed to kill gapeworms as well according to the threads on this wonderful forum!