About a month ago, my three bantam chickens began developing dry flakey patches on their heads and bodies, their feathers fell out on their head and neck, and feathers on their bodies began falling out in clumps. From the research I did online, I thought it was favus, or ringworm, and began treating them with miconazole cream and spray. We brought them into our vet, who sent a sample to the lab and suggested fluconazole for two weeks while she waited for the lab results.
Now two are growing tons of new feathers back, and their energy and appetite is much better. But our cochin is still totally bald on her head and neck and breast, with maybe only a hint of what look like tiny white "hairs" coming in. I just called the vet and the lab results were inconclusive. She said it isn't fungus, but she doesn't know what it is and now wants to charge me for a $200 biopsy. We discussed trying antibiotics first, but I'm hesitant to do that if it is some kind of fungal infection or candidiasis because I know that can make it worse. Do you have any idea what this could be? Is there a chance it is still ringworm and the vet/lab got it wrong, since two are responding to the miconazole/fluconazole treatment? That's what my gut is telling me, as even though my vet is an avian vet, she doesn't seem like she ever really diagnosis our chickens with anything. We just pay her a ton of money, leave with some vague suggestions, and then I find the answer in one of these forums
And just a little more background on the hens in case it's helpful in relation to this problem- we treated them for northern fowl mite about two months ago pretty aggressively by rotating Sevin Dust, Permectrin II, Ivermectin, and Frontline. Wonder if this could be a reaction to all of the chemicals? Also, their coop is located under an oak tree, which our vet worried may have some kind of fungus that could be making them ill. Could that be the case if they are eating some of the acorns maybe? The have also had scaly leg mite for a while, which has been difficult to cure, and currently have a mild case of bumblefoot, which our vet said not to worry about. The girls can't seem to catch a break!
Also, we don't have a rooster, and it's not feather-picking.
Thanks for the help!
Here are some photos:
Edited by lilyeti - 10/10/15 at 7:27pm