I have no access to medical care for a chicken where I live. I rely on the information online from other people who raise chickens. That being said, when I had 2 chickens start losing feathers and the whole flock stopped laying I knew I had something serious. I determined it was likely coccidia. I purchased the appropriate treatment from Valley Vets and treated the whole flock as directed, in addition to the other things recommended. The girls are now showing feather growth and a few eggs. I am so grateful that Valley Vets made this available! Literally a life saver for my chickens and a huge relief for me.