Too late to worry about quarantine. The moment you put them within 100' or so of your existing birds, or visited your both group of birds with the same shoes or clothes, you already spread biological contaminants from one group to the other. So all you should be working on right now is integration.I should worry about quarantine for disease reasons as well as separation as part of the integration process, right? So... If they came home on Saturday, can I let them out of their small coop and into their side of the yard on, say, Tuesday? tia.
The noise I can't help you with - the existing birds are alerting because of newcomers, but they have to be around the new ones to get used to them.The older ones do not stop screaming the whole time they're in their yard and I cannot stand the racket so have let them go self-isolate out of sight, out of mind, lol.