My Hamburg has been showing these symptoms periodically for a couple months, but it's now just showing up in my pullets too. I treated the Hamburg twice with a round of Tylan 50 injected, but I feel that's not helping, at least not long term. My coop hasn't been cleaned in about a month, but I did use lyme and a lot of straw. They have all been in more with the cold weather/snow, so it's gotten dirty faster. I do keep it heated. Last wormed about a month ago. Any ideas on what this is and how to treat. I have Corid and Tylan 50 injectable on hand...
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