Three weeks ago, I acquired 3 Golden Sex-Linked hens, all three-year-olds. I placed them in a quarantine tractor. One of the birds has been lethargic and eating less this past week plus, she had a pasty butt. This morning, that bird was dead. This is my first loss, so I am not sure if I should extend the quarantine for the other two. My hunch is yes, I should but for how long? When will I know if they are okay to put with the other flock?