This period should be from 30-45 days at a minimum. During this time you
watch very
closely for signs of illness. The perfect way to do this is for a totally
different air space than
any of your other birds and a total change of clothing and a shower before
you go near any
of your birds before and after being with new birds. This is not possible
for a good
percentage of us, so get as close to perfection as you can in your situation.
Kathy Greaser
http://members.tripod.com/~KGKAT/Aviary.html