Hi there! I have read in other threads that it is good to quarantine new flock members for 30 days. I will be adding two vaccinated Barred Rocks that are 12 weeks old. They've been vaccinated for Marek's, Fowelpox, Newcastle, and Bronchitis. I have purchased them from a reputable breeder. My current flock has been vaccinated for Marek's as I purchased them from a hatchery as chicks, they're 17 wks old. Do I still need to quarantine for the full 30 days or can I add them sooner? Thank you!