Allister: you mentioned that your breeder 1 (lutino x normal) was able to hatch 1 chick, right? however namatay lang, that means that you have a true pair that is capable of producing offsprings. Daghan man gud reasons and conditions that contribute to low percentage of successful breeding. Why is breeder 2 very prolific... suggest you visit us on September 28 at SM CITY Cebu 2nd floor for Cebu Avian Society 6th anniversary BirdShow, there will be breeders around to share our experiences with the public on proper bird care and breeding.
About sexing birds, pelvic method is okay but your birds must be matured enough para walay sipyat, DNA is 100% exact way of sexing birds but it doesn't mean that if you have a male and female bird they are compatible to produce offsprings, the last method is place the same specie of birds on one large flight and let them choose their own partners this is called natural pairing. Natural pairing will give you the best results in breeding.
Hope naka tabang somehow, see you at the show guys....