I have 11 parakeets. 3 are definitely female. One is with a male. She lays eggs and I replace them with dummy eggs. another is now with 2 males. She did lay about 4 eggs in the last 3 years. They all crashed on the cage bottom and broke then she quit laying. The third is in with 3 males and in three years has never payed an egg. Are some parakeets sterile? Iām glad though because I donāt want more parakeets, but I wonder about this. Thanks for any insight.