First off even if you never have that bird vetted and I know some who do not vet
(not getting into the should and should nots)
but Still do Peeps and he new bird the favor of quarantining by keeping them in their own cages and rooms and washing hands between handling i even change shirts
This is the ONLY way to be certain your baby does not get sick
If that new one comes in sick and the stress of moving kicks it into high gear and it starts shedding him and peeps will be dead and you will be wishing you has listened believe me i am speaking from watching it happen Thankfully not my birds but a fellow rescuer who had to shut her doors and only work with sick birds.
Also having owned and bred parrotlets since 2008 ( i am thankful to say I belong to 3 of the BEST parrotlet groups there are with some of the best parrotlet folks out there) I have learned one thing
Parrotlets do NOT take kindly to other birds in their space
they are extremely territorial
when I brought Bingo home and Manny and him were placed near one another even though they were both still youngsters they were ready for battle and locked claws on my bed.
Parrotlets are so territorial that you can not leave a baby in the box alone or it will be killed You must also pull them shortly after they feather and wean or Dad will see them as intruders and kill them
With the new one being a conure he May just well kill the parrotlet I can assure you one thing the parrotlet will not back down
i have two Black capped conures and I can not have them and the parrotlets even babies out together
So PLEASE invest in a cage for each bird and spend that 30 days spending time bonding with the new one in another room That also is a good idea as it helps you have bond time without jealousy from the parrotlet and he will get jealous
As i said I belong to some wonderful Parrotlet groups we even have a gathering once a year
If you would like to learn more about them you are welcome to join us.
NOT mine you that you can not learn here too.
I have all new owners of my parrotlets be they my babies or a rescue join the groups
this is for one called Parrotlet Express
http://groups.yahoo.com/group/ParrotletExpress/
and Parrotlet Plus
http://groups.yahoo.com/group/ParrotletsPlus
Parrotlet Place this is a slower group
TheParrotletPlace : The Parrotlet Place
also there is a wonderful site for parrotlet info here
http://www.squidoo.com/landofthelittles
Hope this helps