Just don't push them together, have them in the same room but not close, they will eventually get used to each other but probably not friends. My grey, Josey and my sun Conure, Sunny, don't like each other and sometimes I have both of them on my shoulder at the same time but I keep them separated, one on each shoulder. Sunny likes to sneak up on Josey and try to pick a fight and nip at her, she can be a little pain at times.