Gouldian feedig babies that are not hers

[Alley]

Hello,
So I got a new female Gouldian that is 8 months old and just added her to my flight cage as she is finished with quarantine.
I was a bit apprehensive as I added her to my flight care that houses a bonded pair and their 2 young that fledged a week and a half ago. I have been watching very carefully and kept her quarantine setup in case here was any fighting where she had to be removed.
I am currently on the hunt for a male for her.
Anyways there has been no fighting what so ever and things are going great...almost too great.
The fledglings will sleep in the nest on some nights and the new female will go in with them. She is also feeding them. The parents don't seem to care at all and they have been very doting parents.
Pretty much I have 2 hens and one cock raising the two babies.
Is this normal?
Thanks

[Sheather]

A lot of birds do that.

I've had seven societies caring for six babies before.
I had a male Java who would feed baby zebra finches.
When we had baby budgies, two adult males in addition to the mother and father, with no relation to the chicks, would feed the fledglings.
It's not even necessarily limited to young; I even had a hen canary feed an injured adult male.

[debbie276]

Perfectly normal