can any one help me . i have 2 male yellow face gouldians in with my 2 black face white breast.but they will not breed they have all bred before but not with the 2 pair i have seperated. trying to get yellow faced white breasts.????????? any help would be appreciated.

Where are you from? brisbane

It sounds like they have bonded with other mates from previous matings. This bond will weaken if they have been seperated for a while. To speed things up you could add a third male to the group to create more competition.