I purchased 7 chicks a few months ago that are now 17 weeks old. There were supposed to be 6 hens and 1 rooster but there turned out to be 2 roosters. Last week, I took one of the roosters back to the same farm I bought all the chicks from and traded it for a 2 year old sex link. I didn't think much of it, and I brought it home and put it right in my flock. They all picked on it quite a bit, but nothing serious. Now I'm reading that I should quarantine this bird because it could spread disease to my whole flock? I've had it for 3 days now. Is it too late to quarantine? Do I absolutely have to quarantine it? (It would be a lot of hassle) What are the chances of it spreading disease to my flock and in what manner should I quarantine it? Can I simply put duramyacen in the water for a few days? Any suggestions will help, I'm very concerned now that I've read about the risk of disease.