Infertility in Blue Gouldians

[Gouldnewbie]

Hi all, I've been keeping and breeding Blue Gouldians for about 4 years now. It's only through this season I've had very low to zero hatchings from Blue to Split pairings. Nests of good numbers of eggs laid, all clear in shell after 14 days of continuous incubation from both parents.

Now I have a few pairs of Split Blue to Split Blue pairs who are onto their second nests for this season with 5 young each again. They were left over young from last season that didn't find new homes so I Let them do their thing in their own Aviary.

I'm trying to figure out what is causing this infertility issue. Is it that they have already aged too much and are no longer fertile?
Is the continued use of supplements making them sterile?
Have I got a serious infectious disease that has made its way into some of my birds affecting fertility (ornithosis)?

They all get the same diet, have all been wormed etc
I've never experienced this throughout decades of breeding Normals, Euro Yellows or any other species

Any other Breeders of Blue Gould's experience similar?

[Craig52]

Hi, blue gouldians have a vitamin A and E deficiency but not in split blues and they produce relatively high fertility.
Some blue gouldian breeders I know feed an A and E supplement available from Allfarm stock foods in Victoria, they also sell soluminavit which is vital to keep blue gouldians alive from birth to adulthood and beyond.
One person disagrees with what I just said but here on East Coast it vital for blue gouldians.
Vitamin E is vital for fertility in blue gouldians. Hope this helps you. Cheers