what part of you dont grab do you not understand lol...you dont grab or hold PERIOD...only in EXTREME situations and that does not justify as a EXTREME situation such as severe injury or severe illness where a avian vet would hold the bird to examine...you can actually break their ribs or suffocate these little guys in seconds by holding them improperly..im thinking you have not even had your other bird to a avian vet for checkups or you would of been shown how to hold a bird properly IF IN EXTREME EMERGENCIES you needed to...which would be like holding a cracked egg ...very very gently and not squeeze to tight in a effort to restrain around its body which can cause serious injuries or even death

sorry but i think you just traumatized me with this never mind your birds...

and what are the dimensions of the cage please...if you just got this bird you shouldnt even be putting your hands inside...and just walking away when it was freaking out or putting a cover over it and darkening the room would have calmed it with a heck of a lot less stress...

SEPARATE THE TWO AS YOU NEED TO QUARANTINE...or risk losing BOTH BIRDS to some disease OR INJURY