My black leghorn evie has been acting weird the last 2 days...she's not her chippy self! She's all puffed up and hardly walking around in the run. I saw she had a scab on her back but no signs of mites. The other chickens are acting fine and not bothering her. I just got rid of my rooster yesterday and she was his favorite. Should I take her out of flock? What could be wrong with her?! Please any info would help! Thanks!