Do you need to identify the parasite or is there a broad spectrum wormer for chickens? Should you routinely worm your chickens even if there are no S/S of a problem? If so, how often and with what? The reason I'm asking is that I just found one of my 15 week old chickens looking really wierd this morning. He/She was just standing in the sun slightly puffed up with its eyes closed. Definitely NOT acting normal. I picked it up and it felt light. I put it in a cage and brought it to the house. Upon closed inspection I saw a long "string" hanging from its rear. It looks like it could be a worm. Definitely not vegetation. Thanks for any advice.